Do fish know when another fish is dying?

The majority of the animal kingdom, including fish but not dolphins, do not have a sense of identity or self-recognition [1]. So they likely do not experience an abstract awareness of their eminent demise.
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Do fish know when other fish die?

They may react to some extent but in a more physiological way than an emotional way. Also, pairs may look lost for a while when one of them dies, but because fish have short-lived memory, they can get over the death in no time. Sometimes fish release a substance called Schreckstoff when they're stressed.
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How do you know when a fish is about to die?

Loss of appetite. Weakness or listlessness. Loss of balance or buoyancy control, floating upside down, or 'sitting' on the tank floor (most fish are normally only slightly negatively-buoyant and it takes little effort to maintain position in the water column) Erratic/spiral swimming or shimmying.
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Can a dead fish harm other fish?

A dead fish should be removed from its tank immediately after you've found out about the incident. This is because when a fish dies it starts to decompose right away, which could foul the water in the aquarium. The polluted water may then kill the other fish in the tank.
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Should I flush my dying fish?

There are many methods of fish euthanasia that are not considered to be humane and must not be used. These include flushing live fish down the toilet; immersion in ice or placing in the freezer, boiling, decapitation without stunning or pithing or suffocation by leaving fish out of water.
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TOP 3 signs your fish is going to die



Should I flush my dead fish?

While your septic system and plumbing are designed for disposing of undesirable materials, dead fish are not on the list of flushable items. Septic systems are only meant to handle human waste, water and toilet paper.
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What fish do before they die?

Most fish are slightly denser than water, so sink immediately after death. However, like a drowned human, they become more buoyant over time as bacterial decomposition produces gases inside the body. Usually, enough gas builds up in body cavities to make the corpse float, like an inflated balloon.
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How do you make a dying fish comfortable?

A dying fish is comforted greatly by having clean, warm water along with a safe and quiet environment without bright lights or loud noises. A dying fish should also be removed from any other aggressive fish in their tank and not overfed to avoid stomach pain or discomfort.
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How do I save my dying fish?

Follow these steps for the best chance to save your sick fish.
  1. Step 1: Check Your Water Quality. Poor water quality is the #1 cause of illness and disease in fish. ...
  2. Step 2: Fix Your Water Quality. ...
  3. Step 3: Check Your Fishes' Food. ...
  4. Step 4: Call Your Veterinarian About Your Sick Fish.
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Do fish get sad in tanks?

Fish become frustrated and unhappy when kept in cramped bowls or tanks. House fish in a large filtered tank. All tanks should have a pump to keep water flowing continuously.
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Does putting a fish in the freezer revive it?

Certain species of fish do survive in frozen or near-freezing temperatures, during what is called an “overwinter” by the NOAA. They will go dormant, often burrowing into sand or hovering in large groups, and “revive” when the water warms up or thaws.
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Why is my fish not moving but still breathing?

If fish are experiencing acute stress (i.e., gasping up at the surface, lying on the bottom and not moving, or darting around the aquarium), you can be pretty sure that the water has been poisoned in some way. Maybe cleaning sprays got into the aquarium, or something released toxins into the water.
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Can salt save a dying fish?

Aquarium and Epsom salts are very beneficial to your fish. You can use any salts to clear any wastes or toxins from your fish body and revive it. These salt baths are best when the fish has overfeeding issues or mild infections. Make Epsom salt bath as recommended, and your fish will survive.
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Why are my fish swimming upside down after water change?

Nitrate-causing gunk can also build up in the aquarium's filter, so change/rinse it as needed. If your fish experiences upside-down swimming after a water change, this can be a good sign of environmental stress.
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What to do if a fish is laying on its side?

If you find your fish floating on its side, not feeding it for three or four days can often solve the problem as the fish's body recovers from the gorging and rights itself again. Feeding crushed green peas can help alleviate constipation, which in turn will help the fish's swimbladder to work effectively once more.
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How can you tell if a fish is sad?

If your fish is swimming frantically without going anywhere, crashing at the bottom of his tank, rubbing himself on gravel or rocks, or locking his fins at his side, he may be experiencing significant stress. Talk to your veterinarian about treatment and look into what may be causing the stress and alleviating it.
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Why do fish eyes pop out when they die?

The swelling of the fish's eye is caused by tissue fluid leaking into the region behind the eyeball. Pressure builds up as the amount of fluid increases, forcing the fish's eyeball outward.
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Why is my fish wiggling?

Shimmying is a symptom rather than a single disease, and an indication that a fish no longer has proper control of its nerves and muscles. It occurs when fish are under severe stress, most often because of environmental problems. The classic scenario is when mollies are kept in soft or acidic water conditions.
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Do fish have feelings?

Fish Have Feelings, Too: The Inner Lives Of Our 'Underwater Cousins' : The Salt Jonathan Balcombe, author of What A Fish Knows, says that fish have a conscious awareness — or "sentience" — that allows them to experience pain, recognize individual humans and have memory.
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What to do after a fish dies?

Remove. Any dead fish should be removed, as its body will quickly rot in the warm, bacteria-laden water. A corpse will pollute water, risking the health of other fish in the tank. If it died from disease the last thing you want is other fish consuming its body parts, so remove immediately.
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Can I bury my fish in a plant?

You can bury fish in a potted plant as it provides a rich source of nitrogen fertilizer that encourages foliage growth. You will need to bury it deep and keep the pot outdoors till the fish decomposes and the smell disappears. This is a good method to lay rest to a dead pet fish or leftover meal.
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Why is fish laying at bottom of tank?

When the water temperature inside your aquarium drops too low, your fish might lay motionless at the bottom of the tank to conserve energy. On the opposite spectrum, if the water temperature rises dangerously high, fish will stay on the bottom because that's where oxygen levels will be higher.
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Why is fish lying on its side?

Swim bladder disease is when a fish loses its ability to regulate the air going in and out of its swim bladder. This causes the fish to swim strangely, on its side, or even upside down. The job of the swim bladder is to help the goldfish stay stable in the water and control the way in which it floats.
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Why are my fish staying in one corner?

Just like sickness, they stay in the corner because they feel vulnerable. Unfortunately, there's not much you can do for this one except wait for it to pass. Lastly, they may be doing it because there aren't enough hiding places in the tank—all fish like lots of hiding places where they can feel safe and rest.
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