Search results
Results From The WOW.Com Content Network
A pregnant Southern platyfish. Pregnancy has been traditionally defined as the period of time eggs are incubated in the body after the egg-sperm union. [1] Although the term often refers to placental mammals, it has also been used in the titles of many international, peer-reviewed, scientific articles on fish.
Most male fish have two testes of similar size. In the case of sharks, the testes on the right side is usually larger [citation needed].The primitive jawless fish have only a single testis, located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.
Pregnancy in fish; Pufferfish mating ritual; R. Reproduction and vocalization in midshipman fish; S. Slime coat; Spawning trigger This page was last edited on 26 ...
Ovoviviparous fish give birth to live young. Unlike viviparous species, their embryos are nourished by an egg yolk, and not directly by the parent. See also: Category:Viviparous fish - fish which give birth to live young which receive nourishment whilst in the womb.
Viviparous fish are fish that give birth to live young, the eggs develop whilst receiving nutrition from the parent.. See also:Category:Ovoviviparous fish - fish which give birth to live young which do not receive nourishment from the parent whilst in the womb.
Morays are opportunistic, carnivorous predators [16] and feed primarily on smaller fish, crabs, and octopuses. [17] A spotted moray eel has been observed eating a red lionfish without harm. [18] [19] Groupers, barracudas and sea snakes are among their few known predators, making many morays (especially the larger species) apex predators in ...
Male pregnancy is a common feature in the family Syngnathidae, which includes pipefish, seahorses, and sea dragons. [12] This type of polyandry has been demonstrated by analyzing the genetic composition of Gulf pipefish , Sygnathus scovelli and straightnose pipefish , Nerophis ophidion , which shows that males only mate once during their ...
Some fish have evolved to exploit the mouthbrooding behaviour of other species. Synodontis multipunctatus, also known as the cuckoo catfish, combines mouthbrooding with the behavior of a brood parasite: it eats the host mouthbrooder's eggs, while spawning and simultaneously laying and fertilizing its own eggs. The mouthbrooder (typically a ...