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Goldfish. Goldfish, like all cyprinids, are egg-layers. 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.
The common goldfish is a breed of goldfish and a family of Cyprinidae in the order cypriniformes. Goldfish are descendants of wild carp from East Asia. [ 1 ] Most varieties of fancy goldfish were derived from this simple breed. [ 2 ][better source needed] Common goldfish come in a variety of colors including red, orange, red/white, white/black ...
The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have become an invasive pest in parts of North America and Australia. [4][5]
Dorsal finned varieties. Orange-white Ryukin goldfish. Fantail goldfish - It is the western form of the ryukin and possesses an egg-shaped body, a high dorsal fin, double caudal and anal fins, and no shoulder hump. Veiltail goldfish - It is similar to the fantail goldfish, except that they have longer fins.
Fish retinas generally have both rod cells and cone cells (for scotopic and photopic vision), and most species have colour vision. Some fish can see ultraviolet and some are sensitive to polarised light. Among jawless fishes, the lamprey [1] has well-developed eyes, while the hagfish has only primitive eyespots. [2]
Ranchu. The Ranchū (蘭鋳, 蘭虫, 卵虫, "Dutch worm") (also Maruko) [1] is a hooded, dorsal fin lacking variety of goldfish native to Japan. [2] It is referred to as the "king of goldfish" by the Japanese. [3] Maruko more commonly refers to the egg-fish goldfish. [4]
Spawn (biology) The spawn (eggs) of a clownfish. The black spots are the developing eyes. Spawn is the eggs and sperm released or deposited into water by aquatic animals. As a verb, to spawn refers to the process of freely releasing eggs and sperm into a body of water (fresh or marine); the physical act is known as spawning.
The comet-tailed goldfish breed was developed in the United States from the common goldfish by Hugo Mulertt, a government worker, in the 1880s. The comet goldfish was first seen in the ponds of the U.S. Government Fish Commission in Washington, D.C. [1] [2] Mulertt later became a propagator of goldfish and an author of books on goldfish.