Web Search Results

Explore web search results related to this domain and discover relevant information.

Do fish sleep?

That is, sleeping means closing your eyes and resting. The first thing we notice is that, except for sharks, most fish don't have eyelids. Also, while some ocean fish never stop moving, many fishes live nearly motionless lives and do so on a regular diurnal/nocturnal cycle, some active by day ... Sleep is described as a period of rest in which the eyes are closed and there is little thought or movement. That is, sleeping means closing your eyes and resting. The first thing we notice is that, except for sharks, most fish don't have eyelids. Also, while some ocean fish never stop moving, many fishes live nearly motionless lives and do so on a regular diurnal/nocturnal cycle, some active by day others by night.Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest. These periods of "suspended animation" may perform the same restorative functions as sleep does in people.The nature of fish "sleep" is an area of active research. While fish do not sleep in the same way that land mammals sleep, most fish do rest.

Why These Mexican Fish Do the Wave - The New York Times

Soccer fans aren’t the only ones on Earth who make waves. Scientists in Germany, unable to visit the fish because of the coronavirus pandemic, analyzed hours of video taken over the course of two years of bird attacks, both real and simulated by a researcher, and believe they may have decoded the missive being transmitted by the fish. It seems to be aimed at predators perched on the shore, they report in Current Biology on Wednesday. The message reads: We see you. We are watching. Don’t try any funny business.When the researchers watched kingfishers, they saw that the more times the fish flashed, the longer the birds waited, as if they were waiting it out, too. The response suggests that not only does the flashing behavior make it harder for the predators to zero in on a fish, but that the birds also know that their efforts are more likely to be wasted once the waves begin.This is an intriguing observation, because if the fish were merely trying to escape from the predators, they could dive deeper and stay down longer. Though the low-oxygen environment of a sulfur pool means they can’t stay under indefinitely, they are perfectly capable of more extended stays below, Dr.The birds learn “to avoid these waving fish shoals afterward because the chance of getting a fish is lower if the waving is happening — and the fish don’t get eaten, which is a win-win situation,” Dr. Bierbach said.

meaning - What does the expression 'Do the fish' mean? - English Language & Usage Stack Exchange

I just recently heard this expression and couldn't quite figure out its meaning from the context, unless it means something like "take the bait." Is this a common expression? Is it perhaps an Edit: The basic context in which I heard this expression used was this: one person asked a technical question of a group, to which a member of the group responded, beginning with "I'll do the fish" and then proceeding to the technical explanation.Usually in such a context, when proceeding to outline the details of a proposition someone would say "I'll do the math." ... Voting to close as "too localised". Apparently this expression was only used by one person, and wasn't understood by his audience anyway. I cannot see why this question would be relevant to anyone else, since we're presumably never going to come up against the phrase again. ... Well, I bit the bullet and asked the guy what the heck he meant (imagine that). Turns out he was referring to the oft-quoted teach a man to fish proverb.I think that the speaker here meant 'Do the fish" to mean the same thing as 'take the bait'.I'll do the fish and take the bait.

Do fish sleep? Here’s what scientists have discovered so far | National Geographic

Sleep in fish may look different from humans, but rest is essential for survival. Here’s what experts have to say about fish sleep. With at least 20,000 species of fish known to science, behaviors vary widely across the many different kinds of fish. Some may exhibit features more like those we’re used to seeing from mammals, while others perform rest-like states that are unlike anything we’re used to. Most research suggests that brains need downtime, says Michael Heithaus, a marine biologist at Florida International University.As the plankton ascend, so do their predators, and the predators of those predators, in a parade of biomass that plays an enormous role in the way nutrients are cycled throughout the planet’s oceans. While many fish simply find a quiet spot to drift off at night, parrotfish take bedtime to the next level—secreting themselves inside a layer of mucus like underwater sleeping bags.But given that fish brains are very similar to our own, it’s no surprise that fish need to power down from time to time, too.“They are kind of still thinking about breathing, coming up to breathe, and they’re pseudo-alert,” says Heithaus, “but that’s kind of sleeping for them.” Obviously, dolphins are mammals, not fish, but it’s possible whites and other sharks have evolved a similar behavior.

Fish | Animal Database | Fandom

Fish may have evolved from a creature similar to a coral-like Sea squirt, whose larvae resemble primitive fish in important ways. The first ancestors of fish may have kept the larval form into adulthood (as some sea squirts do today), although perhaps the reverse is the case. In earlier times, even biologists did not make a distinction – sixteenth century natural historians classified also seals, whales, amphibians, crocodiles, even hippopotamuses, as well as a host of aquatic invertebrates, as fish. However, according to the definition above, all mammals, including cetaceans like whales and dolphins, are not fish.A typical fish is ectothermic, has a streamlined body for rapid swimming, extracts oxygen from water using gills or uses an accessory breathing organ to breathe atmospheric oxygen, has two sets of paired fins, usually one or two (rarely three) dorsal fins, an anal fin, and a tail fin, has jaws, has skin that is usually covered with scales, and lays eggs.Jaws allow fish to eat a wide variety of food, including plants and other organisms. Fish ingest food through the mouth and break it down in the esophagus. In the stomach, food is further digested and, in many fish, processed in finger-shaped pouches called pyloric caeca, which secrete digestive enzymes and absorb nutrients.Hearing is an important sensory system for most species of fish. Fish sense sound using their lateral lines and their ears. Experiments done by William Tavolga provide evidence that fish have pain and fear responses.

Do Fish Have Feelings? | World Animal Protection

Discover the truth: Do fish have feelings? Explore insights and findings from World Animal Protection. Dive into the emotions of underwater creatures now! Fish respond to painful experiences. · During an experiment where bee venom or vinegar was applied to the lips of trout, they responded by rubbing their lips on the side of the tank and lost their sense of neophobia (the fear of novel objects that is key to their survival). Then, when the trout were given painkillers, their behaviour reverted to normal, proving that they do experience pain.Clearly, they have extensive cognitive abilities – but a fish’s intelligence doesn’t end there.Fish can feel – and there’s over 30 years of scientific research to prove it. Between 1990 and 2020, 349 articles documenting sentience in fish were published.Fish sentience is very misunderstood. We often dismiss fish as unfeeling and incapable of key sensations such as pain. This is partly because they are so physiologically different from us mammals, and lack the physiology that we attribute to consciousness and feeling.

U.S. Fish and Wildlife Service

WASHINGTON – The Department of ... the U.S. Fish and Wildlife Service. This final update more than triples... ... Invasive species are a global problem, wreaking havoc on native ecosystems and causing $23 billion in damage annually. Once established, they are often impossible to eradicate, making prevention crucial. Because they do not abide ... WASHINGTON – The Department of the Interior today announced 42 new hunting and sport fishing opportunities across more than 87,000 acres within the National Wildlife Refuge System and National Fish Hatchery System, managed by the U.S. Fish and Wildlife Service. This final update more than triples... ... Invasive species are a global problem, wreaking havoc on native ecosystems and causing $23 billion in damage annually. Once established, they are often impossible to eradicate, making prevention crucial. Because they do not abide by jurisdictional boundaries or international/state borders,...With more than 560 national wildlife refuges, dozens of national fish hatcheries and more than 100 field offices, there are numerous great U.S.United States federal agency that manages national wildlife refuges, protects endangered species, manages migratory birds, restores nationally significant fisheries, and enforces federal wildlife laws.With more than 560 National Wildlife Refuges, 70 national fish hatcheries, numerous regional and field offices across the country and thousands of active conservation projects, the nearly 8,000 employees of the U.S. Fish and Wildlife Service have a lot going on.

Do you fish? - Quora

Answer (1 of 4): I don’t anymore. I know that the nearby river is filthy from upstream industrial and agricultural runoff. There are about 20,000 affluent houses around the local lake shore whose shit drains into the lake. And, the drainage from the watershed isn’t trustworthy either.

Fish Eat Fish | Fish eat fish Wiki | Fandom

Fish Eat Fish is a video game made by Indiesoft. Indiesoft is based in Belarus. In Fish eat Fish, players have to eat targeted animals (if they have turned hunting on), as doing so will grow the fish, allowing it to eat more stuff. 0: Worm, Mini Piranha 50: Flounder 100: Small Piranha, S. Perch, ... Fish Eat Fish is a video game made by Indiesoft. Indiesoft is based in Belarus. In Fish eat Fish, players have to eat targeted animals (if they have turned hunting on), as doing so will grow the fish, allowing it to eat more stuff. 0: Worm, Mini Piranha 50: Flounder 100: Small Piranha, S. Perch, S. Dorado, S. Goldfish, S. Balloonfish and S. Herring 200: Medium Piranha, M. Perch, M. Dorado, M. Goldfish, M. Balloonfish and M. Herring 300: Big Piranha, B. Perch, B. Dorado, B. Goldfish, B...

r/stupidquestions on Reddit: Do fish ever get thirsty or do they just… exist in drink?

2K votes, 204 comments. This randomly hit me in the shower. Like, do fish feel thirst? Or are they just permanently hydrated because they’re in the… This randomly hit me in the shower. Like, do fish feel thirst? Or are they just permanently hydrated because they’re in the water? And if they do get thirsty, how would they even know? I know this is dumb, but now I can’t stop thinking about it.Because they'll do it until they starve to death, as discussed below. ... They asked about fish, not mammals.A lot of animals in the wild don’t drink water. They just get their fluids from the food they eat. Fish definitely do not “drink water”. They naturally have water going in their mouth every time they eat food or open it at all.Not all fish can breathe out of the water. A lot lack the ability to bring airflow over the gills. It’s like paralyzing your diaphragm/ abdominal muscles and asking you to breathe. The air is there and your lungs are capable of using the o2 but they just can’t meet each other. ... Dolphins are not fish and do not have gills.

9 Evidence-Based Health Benefits of Eating Fish

In a 2020 review study, researchers concluded that fish consumption is associated with a lower incidence of coronary heart disease (CHD) and mortality. Omega-3 fatty acids are essential for growth and development. The omega-3 fat docosahexaenoic acid (DHA) is especially important for brain ... In a 2020 review study, researchers concluded that fish consumption is associated with a lower incidence of coronary heart disease (CHD) and mortality. Omega-3 fatty acids are essential for growth and development. The omega-3 fat docosahexaenoic acid (DHA) is especially important for brain and eye development.Fish and fish products are among the best dietary sources of vitamin D. Fatty fish like salmon and herring contain the highest amounts. A single 4-ounce (113-gram) serving of cooked salmon contains 127% of the recommended intake of vitamin D for adults younger than 70 years, and 95% of the recommended intake for adults older than 70 years. ... cod liver oil, are also very high in vitamin D, which provides 170% of the Daily Value (DV) in a single tablespoon (15 mL). If you don’t get much sun and don’t eat fatty fish regularly, you may want to consider taking a vitamin D supplement.Before starting, you may want to talk to your doctor about taking vitamins and supplements. Asthma rates have increased dramatically over the past few decades. ... 2018 meta-analysis suggests that introducing fish early in life (ages 6 to 9 months) and regularly consuming all fish (once weekly) may reduce asthma and wheezing in children up to 4.5 years old, while fatty fish intake may be beneficial in older children.Advice about eating fish. (2024). https://www.fda.gov/food/consumers/advice-about-eating-fish · Amza M, et al. (2024). Docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA)-should they be mandatory supplements in pregnancy?

r/Aquariums on Reddit: Do fish grieve?

936 votes, 134 comments. Recently, I had a yoyo loach become ill and pass away. This particular yoyo was the life of the tank. Very active and… His passing was very sad for all of us, but one fish seems to be taking it very hard and it's breaking my heart. He had another yoyo buddy in the tank. They were inseparable; always chasing each other around and generally just chilling in eachothers vicinity at all times. I'm not sure if yoyos form pairs, or bonds like cichlids do, but they definitely seemed like a couple.She became friends with Ellie family he loach, but they don’t do the activities that she and Derek did. I think it’s as close to missing him as a fish is capable of.It made me realize they really do have some more going on behind those stupid little eyes ... My yo-yo is super aggresive and I got told I shouldn’t put any others in the tank with him ( as he used to bite my other fish and then outta nowhere one was dead after getting him and he was MUNCHINNGGG) should I put other yo-yo loaches in there with him ?Pet store folks frequently don’t have the correct information. My loaches are named Ellie and Trinity after the people who sold them to me. I’m upgrading my tank soon and will add two or three more. ... Short answer: yes they can. https://fortune.com/2023/03/23/fish-have-feelings-study-zebrafish-fear-anxious-antisocial/

Do fish feel pain? Not as humans do, study suggests | ScienceDaily

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. Fish do not feel pain the way humans do. That is the conclusion drawn by an international team of researchers consisting of neurobiologists, behavioural ecologists and fishery scientists. One contributor to the landmark study was Prof.To this end, a research team consisting of seven people has examined all significant studies on the subject of fish pain. During their research the scientists from Europe, Canada, Australia and the USA have discovered many deficiencies. These are the authors’ main points of criticism: Fish do not have the neuro-physiological capacity for a conscious awareness of pain.There is still no final proof that fish can feel pain. ... To be able to understand the researchers’ criticism you first have to comprehend how pain perception works for humans. Injuries stimulate what is known as nociceptors. These receptors send electrical signals through nerve-lines and the spinal cord to the cerebral cortex (neocortex). With full awareness, this is where they are processed into a sensation of pain. However, even severe injuries do not necessarily have to result in an experience of pain.Unlike humans fish do not possess a neocortex, which is the first indicator of doubt regarding the pain awareness of fish. Furthermore, certain nerve fibres in mammals (known as c-nociceptors) have been shown to be involved in the sensation of intense experiences of pain.

How Do Fish Survive Hydropower Dams? | Department of Energy

The U.S. Department of Energy has made significant investments in fish passage technologies to help fish and other aquatic species navigate hydropower facilities safely while reducing environmental impact. Fish lifts tend to work well for large numbers of fish and multiple species of fish, including those that may be weaker swimmers. ... Practical Engineering’s Grady Hillhouse further breaks down the technology behind fish ladders and other forms of fish passage.Advanced Turbines for Downstream Fish Passage To reduce the impacts to fish that are unable to be guided away from turbine intakes, significant investments have been made to enable the design of specialized turbines that reduce the risk of injury and harm to fish.Understanding fish behavior around dams and other structures can improve species survival and fish passage technology in the future. · To do this, researchers tag fish with specialized sensors to track and monitor what species, size, and number of fish are passing through hydropower facilities, if they’re injured, and how they respond to changes in water pressure, temperature, and other environmental conditions.As part of America’s clean energy transition, the hydropower sector has a duty to balance high-performing engineering with environmental protections that ensure the long-term sustainability of natural resources and ecosystems. Dams, diversions, and culverts (or drainage structures that move water under roads, railways, and other infrastructure) can restrict fish migration and access to habitats needed to complete their life cycles.

Do fish fish? - Quora

Answer: Many fish eat other fish, so if you define fishing as catching other fish, they certainly do. If you mean with a lure, they also do that. There are many fish commonly called anglerfish, frogfish, goosefish or antennafish that have a lure attached to a rod on their forehead. The lure may ...

Do fish have a home? - Science Journal for Kids and Teens

Researchers wanted to see how fish used coastal habitats in an effort to identify specific areas where protection would be most helpful. One that makes you feel safe and has everything you need to survive? Now imagine you are in your favorite place and a skunk wanders in. You run away because you don’t want to end up stinky. This same thing happens to young (juvenile) fish when their favorite places get polluted or are not protected.+ Audio version of article + Links to lessons about marine protected areas and sustainable fishing + Article translated into FrenchWe tracked European bass (an important fish in Europe) for a year to figure out where their favorite places were. We found that most European bass stayed close to the coastal sites we caught them from. Our goal is to identify more of these coastal sites.Fish might even get caught by fishermen.

How Do Fish Breathe Underwater? It’s Science!

Discover the science behind how fish, dolphins, whales and even sea stars are able to breathe and thrive in aquatic environments. If you find yourself at a beach, lake or aquarium this summer, chances are you’ll hear a child ask, “How do fish breathe underwater, and why can’t people?” Curious kids have been pondering this question for ages. Luckily, the answer is simply science!Most fish have special organs called gills that allow them to breathe oxygen by extracting it from water. Fish take in water through their mouth, and it passes across the gills on its way out. When it does, oxygen gets diffused into the bloodstream and travels through the fish’s body.Help your child research their pet fish or any favorite fish to see how they use their gills! Dolphins and whales are mammals – even though they spend their lives in the water. Because of this, they don’t breathe underwater like fish do. Dolphins and whales have lungs to breathe air.Ask your child what they would explore if they could hold their breath underwater for as long as a dolphin or a whale can. While often referred to as starfish, these creatures actually are not fish at all! Sea stars do not rely on gills to extract oxygen from the water, but they do still require oxygen to survive like most living creatures.

Fish Are Smarter Than You Think | Psychology Today

The new apparatus, a kind of foraging ... disc that a fish can nudge aside to access a food reward hidden below. Researchers can adapt the foraging board to test different abilities; for instance, by marking the rewarded discs with different colors, shapes, or dots of varying number ... The new apparatus, a kind of foraging board, is a 30 by 30 centimeter plate with 24 small holes, each covered by a pivoting disc that a fish can nudge aside to access a food reward hidden below. Researchers can adapt the foraging board to test different abilities; for instance, by marking the rewarded discs with different colors, shapes, or dots of varying number or size, they can probe a fish's discrimination learning, memory, and numerical abilities.Vila-Pouca says she hopes research like this helps change public perception and drives changes in how people treat fish. “I think there's still a lot of work to do in terms of communicating findings and showing the public that fish are smart and they can learn all sorts of things,” she says.Source: Amy E. Deacon, Hideyasu Shimadzu, Maria Dornelas, Indar W. Ramnarine, Anne E. Magurran, via Wikimedia Commons ... Vila‐Pouca C, De Waele H, Parsékian A, Erroi S, De Rooij M, Labohm E, Deacon A, and Kotrschal A. (2025). A novel apparatus for studying fish cognition in the wild.“When we say ‘fish,’ we are talking about over 30,000 species,” says Catarina Vila-Pouca, an ecologist at the Centre d’Ecologie Fonctionelle et Evolutive in Montpellier, France, and one of the study’s authors. “Most of the research that has been done so far has focused on a handful of species that are very well-studied.”

What do fish do all day in a tank? - Quora

Answer (1 of 7): They log all household activity, including WiFi signals whch they can detect through their lateral lines. Later, when the lights and maybe filter are off (they cause interference), apparently sleeping fish will be transmitting this vital information to the commanders of the Battl...

What Do Fish Eat? Complete Guide to Fish Diets & Feeding

What fish eat in the wild & as pets. Learn about fish nutrition, feeding schedules, best foods & species-specific diets. Expert guide with proven tips. While we often think of great whites hunting seals, most aquarium sharks actually consume smaller fish, crustaceans, and worms. These meat-eaters have shorter digestive tracts optimized for processing protein-rich foods. Popular carnivorous aquarium species include bettas, oscars, and many cichlids. Their strong jaws and sharp teeth are perfectly adapted for capturing and consuming prey. Hunting behaviors vary widely among carnivores. Some are ambush predators lying in wait, while others actively chase down prey.Many fish naturally eat less during winter months, responding to shortened daylight hours. Respect these natural rhythms rather than forcing normal feeding schedules. Overfeeding ranks as the most common error among aquarists. Excess food doesn't create healthier fish - it pollutes water and stresses inhabitants.When in doubt, feed less rather than more. Poor storage degrades food quality rapidly. Once opened, use fish food within six months regardless of expiration dates. Store in cool, dry locations away from humidity.Garlic-soaked foods can stimulate appetite in finicky fish. Some species respond better to foods matching their natural prey in size and movement. Medicated feeds require veterinary prescriptions for serious health issues. Follow dosing instructions carefully, as overmedication causes additional stress.