Are goldfish cannibals?

Goldfish aren't exactly cannibals, though, and often make great companions for other fish. It is mainly just fish that are smaller than their mouths that are targets. Actually, goldfish are more social fish and are happiest when they are living among other fish.
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Do goldfish eat each other?

Goldfish by nature are not aggressive, and are not predatory. The short answer would be, "No, they don't eat each other".
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Why is my goldfish killing my other fish?

Overcrowded. Fantail goldfish can become aggressive if they don't have enough space in their fish tank. According to PureGoldfish.com, confined quarters can make the fish feel like they need to compete for space, causing them to chase one another in an attempt to claim their territory.
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Can goldfish eat themselves to death?

Your fish will also enjoy nibbling on leafy vegetables—but as with regular food, you must ensure that you don't put too much into the tank. “Goldfish are greedy and will literally eat themselves to death,” warns Williamson. He advises that you establish a feeding schedule early on—and stick to it!
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Why is my goldfish eating the other fishes tail?

The most common cause of a goldfish being territorial is if they are jealous of other fish in the tank or if the tank is too small. Territorial behavior is distinguished by chasing and nipping other goldfish away from a certain area in the tank.
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Cannibalism in Goldfish



Do goldfish need to be in pairs?

Keeping at least two goldfish in an aquarium is recommended to provide companionship and promote activity. Solitary fish can exhibit depression and lethargy. Goldfish are generally not aggressive so they can be kept with most community fish provided the other fish are larger than the size of the goldfish's mouth.
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How do I stop my goldfish from eating each other?

To attempt to curb aggressive behavior, you can:
  1. Put an acrylic tank divider in your aquarium to separate the fighting goldfish.
  2. Add real plants to the tank to ensure a higher water quality.
  3. Buy rocks and other decorations in which your goldfish can hide to get away from an aggressive tank mate.
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Can fish explode from overeating?

If you overfeed your fish, the effects may not be apparent at first. It's a myth that fish will explode from eating too much, so you don't have to worry about that. However, there are other health concerns associated with overfeeding.
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Will goldfish eat until they explode?

Usually, fish will self regulate and not eat when it is too cold. However, some goldfish, with some of the same traits as your golden retriever, will eat and eat and eat until they explode. If the water isn't warm enough and they can't digest, the food will sit around and rot inside their intestines.
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How do goldfish act when they are dying?

Identify symptoms of a dying goldfish.

The best time to check for signs of disease or death is before feeding. Breathing disorders: look for symptoms such as gasping for air, rapid breathing, skimming the surface of the tank water, or lying at the bottom of the tank, which may indicate disease or poor quality water.
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Will a goldfish eat a dead goldfish?

Do Goldfish Eat Dead Fish? If a fish dies in the tank, there is a good chance that the goldfish will try to eat it as a way to remove it from their home. They act fast too, so if a fish dies in your tank, the goldfish may already begin to eat at it before you get a chance to remove it.
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How do you tell if my goldfish is a boy or girl?

To identify a female goldfish, look for a rounder, thicker body shape. Females may also have a bulge on one side as breeding season approaches, and their vent, or anal opening, may protrude slightly. Male goldfish often have a thinner, more streamlined body shape than females, with a concave vent and a midline ridge.
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Do goldfish get lonely on their own?

Do goldfish get lonely if kept in a tank by themselves? You might be surprised to learn that, no, they don't. At least, not as far as we know. Based on everything we know about goldfish, it is very unlikely that goldfish feel loneliness.
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Is it OK to feed goldfish once a day?

Until they are one year old, you should feed goldfish 2 or 3 times per day. Once they are older than one year, you should feed goldfish just once per day. There are, however, a number of factors that could lead you to adjust this schedule. Also, the type and amount of goldfish food you feed your goldfish is important.
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Why are my goldfish chasing each other?

If your goldfish are chasing each other around the tank, this is sometimes the lead up to mating and generally not cause for concern. What is this? However, if your tank is overcrowded or your fish are in competition over food, your goldfish may become stressed and chase each other off in competition for resources.
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Why is goldfish poop so long?

Goldfish poop that is long and thin is often a sign that your Goldfish isn't eating properly. This is even more apparent when it's also lacking color (as previously mentioned.) If your Goldfish's poop is long and thin, make sure the water quality is good.
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Why does my goldfish have white poop?

The mucus is stretched thin and you'll see a mush similar in color to the pellets you feed. If your fish has not been eating, you will only see the mucus. This is the “stringy, white fish poop” in fish.
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Does goldfish eat their own poop?

Picking up detritus and spitting it out is normal behaviour for goldfish. Goldfish, like their wild relatives carp, are omnivores that find food both both visually (they see something moving in the water) and by rooting through detritus in the substrate.
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Can a fish pop?

Most commonly, fish popeye is caused by an injury, an infection, or poor water conditions in the aquarium. Another cause of popeye is an infection. 1 This is most likely seen in both eyes. Infection may be caused by a variety of organisms, including bacteria, fungi, and parasites.
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Why are my fish eating each other?

Just like any other species of animals, in fish, territories are marked. Therefore, the existing fish tend to keenly observe the new fish and the space they occupy. If the fish feels threatened in some way, they will come up with a plot to eat up the new fish.
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How do fishes sleep?

While fish do not sleep in the same way that land mammals sleep, most fish do rest. 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.
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Why are my goldfish bullying one fish?

One of the most common causes of aggression and bullying between fish is overcrowding. Ensure that you don't have too many goldfish in your tank. If you find that you have too many fish then you should find them a new home or invest in a second tank!
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Why is my goldfish turning black?

Ammonia changes are, by far, the most common reason why goldfish turn black. Generally, the color change starts on the fins. Over time, it can get progressively worse and spread to the body. There, it'll appear as small batches of black skin that look burnt.
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What is a life span of a goldfish?

Goldfish have a lifespan averaging about 10-15 years, with some varieties living up to 30 years when provided with proper care. Unfortunately, many goldfish do not reach their lifespan potential due to inadequate housing conditions. Housing needs to meet both their behavioural and physiological needs.
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