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Goldfish are gregarious, displaying schooling behavior, as well as displaying the same types of feeding behaviors. Goldfish have learned behaviors, both as groups and as individuals, that stem from native carp behavior. They are a generalist species with varied feeding, breeding, and predator avoidance behaviors that contribute to their success ...
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Goldfish have a varied diet that can include pellets, flakes, vegetables, and blood worms. Overfeeding should be avoided as it can disrupt the biological balance and increase the risk of diseases. The recommended feeding amount is what the fish can consume in 2–3 minutes, once or twice a day, depending on the size of the fish.
They usually start breeding after a significant temperature change, often in spring. Males chase females, prompting them to release their eggs by bumping and nudging them. As the female goldfish spawns her eggs, the male goldfish stays close behind fertilizing them. Their eggs are adhesive and attach to aquatic vegetation.
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Pearlscale goldfish are susceptible to swimbladder disorders which affect the ability to maintain normal position in the water. This is attributed to the selective breeding process of fancy goldfish to achieve particular body forms, such as that of the Pearlscale's roundness, which results in the alteration of the appearance of the shape and ...
Visually similar structures to nuptial tubercles are produced by male loricariid catfishes during the mating season, in similar places to nuptial tubercles (snout and fins). These are actually hypertrophied odontodes , which are therefore dermal teeth, rather than keratin, and are covered by flesh containing taste buds.
The wakin has many popular cultures and beliefs in the history of Japanese goldfish. [clarification needed] The wakin goldfish, in Japanese terms, are any 'Huna' bodied goldfish with a single tail (in reference to the popular common goldfish), double tail, or triple tail, while in the US, a wakin is simply a double tail goldfish with a long body.