Do fish have memories?

Are You More Forgetful Than A Fish?

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However, the widely-held belief that fish have three-second memories has been blown out of the water by animal behaviour experts.

The humble goldfish can remember things for three months, and can even tell the time in a rudimentary way.

Do Goldfish Have a 3 Second Memory?

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Do fishes have memory?

However, the widely-held belief that fish have three-second memories has been blown out of the water by animal behaviour experts. The humble goldfish can remember things for three months, and can even tell the time in a rudimentary way.

Does fish oil improve memory?

Fish Oil May Benefit Mild Memory Loss. The omega-3 fatty acids found in fish oil play important roles in brain function and development. There are also claims that fish oil can improve brain function in people with memory problems, such as those with Alzheimer's disease or other cognitive impairments.

Do puppies have memories?

Dogs may have some type of episodic memory, or the ability to remember specific events in the past. A recent study suggests this is possible. However, the same study shows that there are real limits to that type of memory for dogs. Indeed, a dog's sense of smell helps them recognize and “remember” you.

Do Goldfish Really Have a 3 Second Memory?

Do goats have memory?

Goats are far more clever than previously thought, and have an excellent memory. Summary: Goats learn how to solve complicated tasks quickly and can recall how to perform them for at least 10 months, which might explain their remarkable ability to adapt to harsh environments, say researchers.

Do cockroaches have memory?

Those trained at night also had good retention. During the morning, however, when the cockroaches are least active, they were totally incapable of forming a new memory, although they could recall memories learned at other times. In the study, the researchers used cockroaches of the species Leucophaea maderae.

Do pigeons have memory?

No wonder pigeons never get lost on the way home. According to psychologists, who spent five years exploring the limits of the birds' brains, the creatures have remarkably good memories. "Pigeons are very visual animals and we knew they had good memories, but we didn't know they were this good," said Dr Fagot.

Do lizards have memory?

However, spatial memory ability in squamate reptiles has been seen as possible, at best, or non-existent, at worst.

Do squirrels have a memory?

Squirrels can remember problem-solving techniques for long periods and can apply them to new situations, researchers have discovered. Grey squirrels are known to have good long-term memory -- they are "scatter-hoarders," collecting and hiding thousands of nuts every autumn.

Do Fish Have Memory?

Do goats have good memory?

Goats are far more clever than previously thought, and have an excellent memory. Summary: Goats learn how to solve complicated tasks quickly and can recall how to perform them for at least 10 months, which might explain their remarkable ability to adapt to harsh environments, say researchers.

Do snakes have a memory?

Ryan Mattes, Kept and bred snakes for many years. Of course they have a memory, they just don't process it through an emotional brain. So memory, yes, but without the emotional response that is something like 80% of our perception of what memory is.

Do dogs have short memories?

But because dogs aren't verbal, it's very hard for humans to understand whether they have a similar sense of self. However, recent studies show that dogs may have episodic-like memories. So dogs may have short-term, episodic memory, but their associative memories stick with them longer.

Do animals have episodic memory?

Because of this strong parallel between animal brain structures and the structures involved in human episodic memory, there is reason to believe that not only do some animals possess the ability to form what-where-when memories, but that this episodic-like system may be more comparable to human episodic memory than

Do squirrels have good memory?

Squirrels can remember problem-solving techniques for long periods and can apply them to new situations, researchers have discovered. Grey squirrels are known to have good long-term memory -- they are "scatter-hoarders," collecting and hiding thousands of nuts every autumn.

Are fish smart? Do they have personalities? | Even Moland | TEDxArendal

Do dogs have memories like humans?

But because dogs aren't verbal, it's very hard for humans to understand whether they have a similar sense of self. However, recent studies show that dogs may have episodic-like memories. So dogs may have short-term, episodic memory, but their associative memories stick with them longer.

Do Hedgehogs have a good memory?

The hedgehog seems to have quite a good memory, especially for places, and, remarkably, this memory is not affected by hibernation - during the winter, the hedgehog brain shuts down almost completely, yet when the animal emerges in the spring, its memory is 'switched on' again, unimpaired; it will head without

Do puppies have a good memory?

A cat's memory is thought to be at least 200 times better than a dog's. Short term memory for a dog is about five minutes; cats remember much longer, up to 16 hours. Long term memory is harder to determine. We know dogs have a long term memory because they can remember hand signals and words for their lifetime.

Do humans have the best memory?

Marine mammals can remember their friends after 20 years apart, study says. Sorry, elephants: Dolphins have taken the top spot for best memory, at least for now. The new research shows that dolphins have the longest memory yet known in any species other than people.

Do mice have a good memory?

Researchers at MIT have done just that in mice, revealing the brain circuitry that makes good memories good and bad memories bad — and how to manipulate it. Their findings will be published in this week's Nature.

Do dogs have memory like humans?

Dogs remember things, as any dog owner can tell you. Semantic memory is fairly common in the animal kingdom; chimpanzees can use it to memorize words and dogs can use it to associate commands with the actions they need to perform. But until recently, episodic memory has been considered “uniquely human.”

Do dogs have memories of previous owners?

Science of Dogs Remembering Past Owners. Studies on the memory capacity of dogs have had some mixed findings. It is believed that dogs do not have the episodic memories of humans. In other words, humans associate memories with intervals of time.

Do fish have feelings?

“Fish do feel pain. It's likely different from what humans feel, but it is still a kind of pain.” At the anatomical level, fish have neurons known as nociceptors, which detect potential harm, such as high temperatures, intense pressure, and caustic chemicals.

Do fish have hearts?

Fish have a simple circulatory system, which consists of a two-chambered heart, blood, and blood vessels. Unlike humans, they have a single circulatory pattern. Oxygen-deprived blood from the body tissues comes to the heart, from where it is pumped to the gills.

Do fish have eyes?

Fish eyes are similar to the eyes of terrestrial vertebrates like birds and mammals, but have a more spherical lens. Fish retinas generally have both rod cells and cone cells (for scotopic and photopic vision), and most species have colour vision. Some fish can see ultraviolet and some are sensitive to polarized light.

Do fishes have feelings?

Most of us would agree that humans have a level of consciousness, loosely defined as an ability to experience thoughts and emotions. According to this view, the responses fish give to adverse circumstances might be more than just uncontrollable reflexes but are still very simple and have little or no emotional content.

Do fish have bones?

The skeleton of the fish is made of either cartilage (cartilaginous fishes) or bone (bony fishes). The main features of the fish, the fins, are bony fin rays and, except for the caudal fin, have no direct connection with the spine. They are supported only by the muscles.

Do fish have thoughts?

Summary: Fish do not feel pain the way humans do, according to a team of neurobiologists, behavioral ecologists and fishery scientists. The researchers conclude that fish do not have the neuro-physiological capacity for a conscious awareness of pain.

Do fish have ears?

Fish don't have ears that we can see, but they do have ear parts inside their heads. They pick up sounds in the water through their bodies and in their internal ear, according to the National Wildlife Federation. Sharks, which are fish, also have a keen ability to sense electricity.

Do all fishes have bones?

The skeleton of the fish is made of either cartilage (cartilaginous fishes) or bone (bony fishes). The main features of the fish, the fins, are bony fin rays and, except for the caudal fin, have no direct connection with the spine. They are supported only by the muscles.

Can a dog have memory loss?

Canine cognitive dysfunction can occur for a number of reasons, like an accumulation of abnormal proteins in the brain. This creates a build-up of plaque, which eventually damages nerves and results in the loss of brain function, which can affect your dog's memory, motor functions and learned behaviors.

Do betta fish have emotions?

The idea that fish only have a three-second memory is a myth. “We do know obviously that fish in general are more than what we thought they were, in a sense that their cognition is more developed than we previously thought and that they may even experience emotions, for example when in pain,” Moons said.

Do fish have animal rights?

Fish are feeling animals. In fact, scientists worldwide have noted time and again that fish experience pain in much the same way as land animals. Fish are even comparable to dogs, cats, and other animals in the way they feel pleasure.

Do jelly fish have eyes?

A jellyfish has no ears or eyes or nose and no brain or heart! They do not even have a head. Their body is almost totally made of water and is soft having no bones at all. Jellyfish are invertebrate animals because they do not have a spine or backbone.

Do female fish have periods?

Fish, mainly lay or scatter eggs. (altho there are live bearers, like mollys). So, if by period you mean the menstrual cycle like mammals who bear live young, then no, no period. If you mean are there periods where fish are more likely to spawn, then yes.

Do fish have different bloods?

It has been found that blood types exist in fish as they do in humans, although the types are not identical. It has also been determined that, as in humans, the frequencies of different blood types vary, depending on the population sampled.

Do betta fish have feelings?

The idea that fish only have a three-second memory is a myth. “We do know obviously that fish in general are more than what we thought they were, in a sense that their cognition is more developed than we previously thought and that they may even experience emotions, for example when in pain,” Moons said.

Do fishes have heart attacks?

If you're worried about heart disease, eating one to two servings of fish a week could reduce your risk of dying of a heart attack. For many years, the American Heart Association has recommended that people eat fish rich in omega-3 fatty acids at least twice a week.

Does an elephant have a good memory?

So yes, elephants have fabulous memories, and this is one of the things that makes them so special. An elephant's brain can weigh up to 5 kilograms – larger than any other land animal. It helps store that amazing memory.

Do Hush Puppies have fish in them?

Typical hushpuppy ingredients include cornmeal, wheat flour, eggs, salt, baking soda, milk or buttermilk, and water, and may include onion, spring onion (scallion), garlic, whole kernel corn, and peppers. Sometimes pancake batter is used. Hushpuppies are served with seafood or barbecued foods.

Why do fish only have one intestine?

Its function is to absorb water from the remaining indigestible food matter, and then to pass useless waste material from the body. In fish, there is no true large intestine, but simply a short rectum connecting the end of the digestive part of the gut to the cloaca.

How many chromosomes do fish have?

A mosquito has 6 chromosomes, a pea plant has 14, a sunflower 34, a human being 46, and a dog 78. Closely related species tend to have a similar number of chromosomes. For example, chimpanzees, our closest cousins, have 48 chromosomes in each of their cells.

Does Petco have fish?

fish store: buy live pet aquarium fish online. Petco's fish store associates can help you find the right live pet fish for your unique needs. Generally speaking, freshwater aquarium fish can be easier to care for and maintain than their saltwater cousins.

Can puppies have fish?

To make a long story short, yes, dogs can eat fish, and fish can be a part of a healthy diet for your dog, provided it is fully cooked without any additional oils and seasonings, does not contain any bones, and is not a species prone to high levels of mercury such as tuna.

How do dogs memory work?

When food is involved, dogs can have excellent working memories — a sort of mental scratch pad where short-term memories linger. Furthermore, dogs use long-term memories to help them remember tricks, such as rolling over on command, Udell said. Dogs may also have episodic memories.

Can puppies have fish oil?

Fish oil is now available in an easy to use liquid form. The oil can easily be added to your dog's food bowl. Start off slowly, there's no need to rush adding any new supplement, including fish oil. Pet owners should also keep an eye on their dog when any new product is introduced.

Can dogs have fish everyday?

Table scraps, including fish, are not necessary for your dog's health, but fish can make a good occasional treat for dogs, as long as owners keep an eye on their dog's weight. A general rule of thumb to follow for portion control is to make sure treats only make up 10 percent of your dog's daily diet.

Does Walmart have fish food?

Fish Food: Pellets and Fish Flakes - Walmart.com.

Does Dairy Queen have fish?

Dairy Queen should learn from that. In all, the sandwich was a clone of any (insert name of non-chain local ice cream and burger joint) you'd find in Anytown, U.S.A. But then again, chances are if you're at a Dairy Queen, it's not for dinner. The $1.99 DQ Crispy Fish Sandwich has 470 calories and 22 grams of fat.

Can dogs have fish bones?

The biggest risk of feeding fish to dogs, however, is bones. Fish bones are small, brittle, and dangerous. They can lodge themselves in your dog's mouth, throat, stomach, and intestines, sometimes even perforating the organ wall. Not only is this painful, it can also result in an expensive visit to the veterinarian.

Why fish have no tongue?

Fish tongues however do not resemble the muscular tongues of humans. The tongue of a fish is formed from a fold in the floor of the mouth. In some species of bony fishes the tongue has teeth which help to hold prey items. The name of one genus of argentinid fish, Glossanodon, literally means 'tongue teeth'.

What do you feed a fish if you have no fish food?

You can actually just fast your fish fir a few days- they can live a week without food. But it would help to give them de shelled peas and lettuce! Fresh spinach, zucchini, peas and lettuce. Live blood worms, glass worms, brine shrimp and tubifex worms.

Do fish hooks hurt fish?

For years a row has raged over whether angling is a cruel sport, and now researchers have waded into the debate by claiming that fish cannot feel pain. A study has found that, even when caught on a hook and wriggling, the fish is impervious to pain because it does not have the necessary brain power.

Do fish stores buy fish?

Your best bet is to take the fish to a privately owned fish store and they will usually trade you for them or give you some store credit. Besides, petsmart usually stocks their fish like they do their shelves. My Petco doesn't buy, but will take drop offs, no money or store credit given.

Why do memory foam pillows smell?

This “off gassing” of volatile organic compounds is a common and well-documented property of memory foam pillows and mattresses. The fumes are often compared to those experienced in a freshly painted room. If you are experiencing this odor, the good news is you may not have to endure the smell for long.

How long do dogs memory last?

Short term memory for a dog is about five minutes; cats remember much longer, up to 16 hours. Long term memory is harder to determine. We know dogs have a long term memory because they can remember hand signals and words for their lifetime.

Why do birds and fishes have special shapes?

Accepted Answer: Birds have streamlined body so as to reduce the air resistance during flying. Whereas fishes have streamlined body so as to reduce friction in water and help them to move faster.

Why do you have an odor after eating fish?

A fishy smell in urine may be caused by the presence of bacteria, TMA, or an interaction between them. According to a study from 2013, most healthy people produce chemicals that break down TMA, which stops them from smelling like fish, even when they have eaten fish recently or have a lot of bacteria in their systems.

How old do you have to be to buy fish?

Customers under the age of 18 cannot purchase live Companion Animals or Aquatic Life without a parent or guardian present. (Excluding crickets and worms).

How do you memorialize a cat?

Finding ways to memorialize a cat who has passed on can be an important part of the healing process. A photo tribute. Plant something. Have a portrait painted. Write or journal. Make a donation to your favorite shelter or rescue group in your cat's memory. Create a craft project. Create a special memorial space in your home.

Do dogs like memory foam beds?

Memory foam dog beds are not just for large dogs. Many Vets say that older canines will benefit from visco elastic foam senior dog beds. Just like people, dogs and other pets get diseases of aging including arthritis. A good night's sleep for your dog promotes healing and a reduction in pain in both man and mutt.

How do I clean memory foam mattress?

Use a gentle laundry detergent such as those used for hand washing, mixing one part detergent to two parts warm water. Fill a spray bottle with the detergent, and then spray the entire mattress lightly. Don't soak the foam, but keep your spray bottle moving as you spray.

What is garbage memory?

In computer science, garbage collection (GC) is a form of automatic memory management. The garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by objects that are no longer in use by the program.

Can dogs have fish oil for arthritis?

“Fish oil supplements can be beneficial for pets living with a wide range of conditions, including allergies, arthritis, inflammatory bowel disease, heart disease and cognitive problems. But it's important to remember to use a fish oil supplement that's specifically designed for dogs, not humans.

Why fish does not have tongue?

Fish tongues however do not resemble the muscular tongues of humans. The tongue of a fish is formed from a fold in the floor of the mouth. In some species of bony fishes the tongue has teeth which help to hold prey items. The tongue of the lamprey can be protruded from the mouth.

Does fish oil have side effects?

5. Acid Reflux. Although fish oil is known for its powerful effects on heart health, many people report feeling heartburn after starting to take fish oil supplements. Other acid reflux symptoms — including belching, nausea and stomach discomfort — are common side effects of fish oil due largely to its high fat content.

Why does my dog have fish breath?

The inside of a dog's mouth is teeming with bacteria. Halitosis, gingivitis, and periodontal disease all stem from bad oral care for dogs. An internal disease could also be the culprit. Kidney and liver failure can cause bad breath with a fishy smell.

Does fish oil have vitamin E?

Vitamin E protects omega-3 fatty acids and the brain. Low-fat diets also present a special challenge in getting enough vitamin E. DHA is one of the most important of the omega-3 fatty acids in brain and cellular development, found naturally in fatty fish and is a component of fish oil supplements.

Why does my dog have fish bum?

Dogs also “express” their anal sacs when they are scared, which is perfectly normal, if a bit odorous. Anal gland secretions have a distinct smell that many people describe as fishy. If your dog smells like fish, chances are there may be something going on with her anal glands.

Is it OK to have fish everyday?

Government dietary guidelines recommend that people eat fish twice a week. And we know that fish are full of omega-3 fatty acids—which can benefit both heart and brain. While it might be safe to eat fish every day, Rimm says it's still not clear if there is any added health benefits to that level of consumption.

Does Dairy Queen have fish sandwiches?

Dairy Queen should learn from that. In all, the sandwich was a clone of any (insert name of non-chain local ice cream and burger joint) you'd find in Anytown, U.S.A. But then again, chances are if you're at a Dairy Queen, it's not for dinner. The $1.99 DQ Crispy Fish Sandwich has 470 calories and 22 grams of fat.

Does garlic improve memory?

Consuming garlic helps counteract age-related changes in gut bacteria associated with memory problems, according to a new study conducted with mice. The benefit comes from allyl sulfide, a compound in garlic known for its health benefits.

Does hydrocephalus affect memory?

Damage to the frontal lobes or connections with other brain areas and functions can make it difficult for executive functions to work the way they should. This can happen as a result of hydrocephalus (see About Hydrocephalus). Problems with working memory can happen when we try to process a lot of information quickly.

How are memorial diamonds made?

A memorial diamond is a diamond created from the carbon extracted from cremated ashes, hair or a combination of ashes and hair. The natural geologic process that forms diamonds deep in the earth is replicated using high pressure high temperature machines in a laboratory.

What animal has worst memory?

Dogs forget an event within two minutes. Chimpanzees, at around 20 seconds, are worse than rats at remembering things, while the memory spans of three other primates—baboons, pig-tailed macaques, and squirrel monkeys—exceeded only bees (the sole study participant that wasn't either a mammal or a bird).

Does gel memory foam work?

However, many memory foam users complain the material retains an above-average amount of body heat, which causes the foam to sleep excessively warm or hot. By comparison, other mattress mattress materials sleep cooler. Gel memory foam layers are infused with tiny gel particles or beads.

What can I do to memorialize my dog?

10 Ways to Memorialize Your Pet After You Have to Say Goodbye Hold a memorial service. Organize a small gathering of family and friends whose lives your furry, scaly, or feathered friend touched. Create a memory stone. Share the news. Donate. Plant a tree. Get a tattoo. Frame the Rainbow Bridge poem. Create a video or photo collage.

How do you get urine out of a memory foam?

How to Get Pee Out of Memory Foam Press paper towels or clean, dry cloth rags over the urine stain to absorb any remaining moisture. Saturate the area with white vinegar and blot the area again with clean, dry rags until there's nothing left to absorb. Sprinkle baking soda over the area that was stained.

How do you get rid of memory foam smell?

Place a bowl of white vinegar in the room to help remove the odor from the air; as the mattress off-gases, airborne odors will be absorbed. If you don't care for the smell of vinegar, place the vinegar in the room and leave it out all day while you're away, then dump the vinegar down the drain before bedtime.

How do you get the smell out of memory foam?

Set your mattress outside and let it air out for a few hours (only if the odor is from an air-born smell, like smoke, or if it's a musty smell) Spray the mattress all over with a mixture of 2 parts water to 1 part vinegar and let dry. Sprinkle baking soda over the entire mattress and allow it to sit overnight.

How do you deodorize a memory foam mattress?

If you do not have a mild detergent, you can also use a water and vinegar mixture. Put the mixture into a spray bottle and lightly spray the mattress, scrubbing the stained part quickly with an absorbent clean cloth. The vinegar will help dilute the stain and will also soak up any unpleasant odor.

How do I make my memory foam mattress less hot?

Consider these ideas for keeping your memory foam cool at night. Add a Mattress Pad for a Breathable Layer. Improve Air Movement With a Gel Memory Foam Mattress Topper. Choose Moisture Wicking Sheets. Try a Memory Foam Pillow. Turn Down the Heat.

How do you fix a memory foam mattress?

The steps (from start to finish) you might need to use in fixing the memory foam mattress are: Put The Mattress On The Floor. This step should be straight-forward. Putt A Pillow Beneath The Sagging Area. Use A Mattress Topper Or Pad. Plywood Or Cardboard Replacement For A Weak Foundation. Using A Mattress Helper.

Does glucosamine cause memory loss?

No studies have reported whether glucosamine can improve cognitive function or slow decline in people with dementia.

Does CBD help memory loss?

Well, there is a small but growing amount of scientific evidence proving that CBD can help the brain and improve memory. CBD was found to promote neurogenesis, thus reducing the damage to cognitive functions caused by age, disease, and trauma.

Does melatonin cause memory loss?

Memory loss (dementia). Most research shows that taking melatonin does not improve behavior or affect symptoms in people with Alzheimer's disease or other forms of memory loss. But taking melatonin might reduce confusion and restlessness when the sun goes down in people with these conditions.

How does dog memory work?

When food is involved, dogs can have excellent working memories — a sort of mental scratch pad where short-term memories linger. Furthermore, dogs use long-term memories to help them remember tricks, such as rolling over on command, Udell said. Dogs may also have episodic memories.

Can PTSD affect your memory?

Post-traumatic stress disorder. As mentioned above, the stress of PTSD can have severe effects on the hippocampus, causing problems with transferring short-term to long-term memory. There is no one way that patients' memories are affected by PTSD, as shown by a variety of studies.

Does epilepsy cause memory loss?

Any type of epileptic seizure could potentially affect your memory, either during or after a seizure. If you have lots of seizures, memory problems might happen more often. Abnormalities in the temporal or frontal lobes of the brain are the most common reason for memory problems in people with epilepsy.

Do fish feel affection?

1. They are far more intelligent than they get credit for: Researchers have found that fish recognize each other and gather information by eavesdropping. They're capable of remembering past social interactions that they've had with other fish, and they show affection by rubbing against each other.

Do fishes think?

Matter of fact, fish can't really think, either. But here's the kicker. Fish apparently can't even feel pain. Not just an “owwie,” mind you, but actually “pain” — a sensation of equal parts physical discomfort and emotional suffering usually reserved for creatures with big brains.

Do Fishes need light?

Most fish require both periods of light and darkness. Aquarium lights can illuminate fish colors, make it easier to spot tank problems and regulate your fish's sleeping and eating. All fish need periods of darkness, and turning the lights off at night will help you mimic your pet's natural environment.

Do fish feel emotion?

Most of us would agree that humans have a level of consciousness, loosely defined as an ability to experience thoughts and emotions. According to this view, the responses fish give to adverse circumstances might be more than just uncontrollable reflexes but are still very simple and have little or no emotional content.

Do fish get bored in a fish tank?

Fish become frustrated and unhappy when kept in bowls and small tanks. House fish in a large filtered tank instead of bowls, which don't provide enough space or oxygen. All tanks should have a pump to keep water flowing continuously. Bare homes make for bored fish.

Do fish ever fart?

Most fish do use air to inflate and deflate their bladder to maintain buoyancy which is expelled either through their mouth or gills which can be mistaken for a fart. Point being – No farts. The Herring however, is a whole other story.

Do fish hear sounds?

People hear by detecting sound vibrations. Our ears and brain translate vibrations into sounds and language. Fish hear, but their "ears" are on the inside. Bony fishes detect vibrations through their "earstones" called otoliths.

What do fish see?

Science tells us that fish have eyes similar to humans, but they also have protective film over their eyes so that they can see more clearly underwater. Their eyes have rod and cone cells on their retinas, so we know that they can see color as well as in shades of grey, light and dark.

Do fishes need oxygen?

Fish need oxygen too, but since they don t have lungs, they take oxygen from the water in which they live. The oxygen in the water available to fish is called dissolved oxygen (oxygen that is dissolved in the water). Fish use gills to take oxygen from water just as we use our lungs to take oxygen from the air.

Do fish like light?

Most fish require both periods of light and darkness. Aquarium lights can illuminate fish colors, make it easier to spot tank problems and regulate your fish's sleeping and eating. All fish need periods of darkness, and turning the lights off at night will help you mimic your pet's natural environment.

Do fish ever drown?

When people drown, their bodies are deprived of oxygen because their lungs fill with water rather than air. Fish obtain their oxygen from air that is dissolved in the water in which they swim. Oxygen diffuses into the fish through their gills, so if there is not enough air, they drown.

Do fish feel joy?

Experts believe that fish are not only capable of feeling pain, but also pleasure - oxytocin, a "feel-good" hormone, has been discovered in fish.

Do fish hear music?

Some people may believe that fish cannot hear because they don't have ears, but fish actually have several different sound perception organs. Different species of fish can hear using cilia (fine nerve hairs), bladders, otoliths, accelerometers or some combination of those organs.