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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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A mature goldfish is more likely to eat directly from its owner's hand without evident hesitation. While this behavior is welcomed by goldfish owners, it may be problematic in outdoor ponds where predators may eat such friendly prey. Mature goldfish will also explore their surroundings through nibbling or grazing behavior.
Female goldfish spawn (discharge) eggs into the water, encouraged by male goldfish who simultaneously discharge sperm which externally fertilizes the eggs Within two or three days, the vulnerable goldfish eggs hatch into larvae, and rapidly develop into fry Goldfish. Goldfish, like all cyprinids, are egg-layers. They usually start breeding ...
Like ranchu, the bubble eye goldfish lacks a dorsal fin and has a double tail. [4] They normally grow up to 3 to 4 inches in length. If one of their "Bubbles" pop due to pressure or collision with a sharp object, there is a risk of infection where the inside of the sac has been exposed.
The breeding and marketing of fancy goldfish with extreme mutations is sometimes seen as cruel practice by fish keepers and animal rights activists. Because the Pearlscale Goldfish has been bred to such a spherical shape, it may experience problems with its spine and internal organs, reducing its quality of life and longevity.
Flowerhorn breeding resulted in culling of surplus and deformed fish, some of which were dumped in the wild in Malaysia and Singapore, where they survived and disrupted riverine and pond ecosystems. [3] [4] Like most other cichlids, flowerhorns are aggressive and can breed quickly, competing with and eating native fish. [5]
Assorted goldfish. This is a list of goldfish varieties and their characteristics. Currently, there are about 200 breeds of goldfish recognized in China. [1] Selective breeding over centuries has produced several color variations, some of them far removed from the "golden" color of the original fish. There are also different body shapes, fin ...