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parental care in fishes​

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Paternal care occurs in perhaps as many as half of the known species of certain families of teleost fish. One well-known example of paternal care is in seahorses, where males brood the eggs in a brood pouch until they are ready to hatch.

Males from the Centrarchidae (sunfish) family exhibit paternal parental care of their eggs and fry through a variety of behaviors such as nest guarding and nest fanning (aerating eggs).[47]

In jawfish, the female lays the eggs and the male then takes them in his mouth. A male can have up to 400 eggs in his mouth at one time. The male can't feed while he hosts the young, but as the young get older, they spend more time out of the mouth.[48] This is sometimes termed mouthbrooding.

During the breeding season, male three-spined sticklebacks defend nesting territories. Males attract females to spawn in their nests and defend their breeding territory from intruders and predators. After spawning, the female leaves the male's territory and the male is solely responsible for the care of the eggs. During the ~6-day incubation period, the male 'fans' (oxygenates) the eggs, removes rotten eggs and debris, and defends the territory. Even after embryos hatch, father sticklebacks continue to tend their newly hatched offspring for ~7 days, chasing and retrieving fry that stray from the nest and spitting them back into the nest.[49

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