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In fact, protandrous hermaphroditism occurs in many fish, [15] mollusks, [12] and crustaceans, [16] but is completely absent in terrestrial vertebrates. [11] Protandrous fishes include teleost species in the families Pomacentridae, Sparidae, and Gobiidae. [17] A common example of a protandrous species are clownfish, which
The species of colourful sea slugs Goniobranchus reticulatus is hermaphroditic, with both male and female organs active at the same time during copulation. After mating, the external portion of the penis detaches, but is able to regrow within 24 hours. [23] [24] Earthworms are another example of a simultaneous hermaphrodite. Although they ...
Gilt-head bream are protandrous sequential hermaphrodites, maturing as males by age 2, before some develop ovaries and lose their testes in later life. [9] The genome of the species was released in 2018, where the authors detected fast evolution of ovary-biased genes likely resulting from the peculiar reproduction mode of the species. [9]
Sexual dimorphism also occurs in hermaphroditic fish. These species are known as sequential hermaphrodites. In fish, reproductive histories often include the sex-change from female to male where there is a strong connection between growth, the sex of an individual, and the mating system within which it operates. [55]
Closely related taxa can have differing sexual strategies – for example, the genus Ophryotrocha contains species that are gonochoric and species that are hermaphrodites. [30] The sex of an individual may also change during its lifetime – this sequential hermaphroditism can, for example, be found in parrotfish [31] [32] and cockles ...
The common snook is a protandric hermaphrodite fish species. [5] Its spawning season spans from April to October. The peak spawning occurs during July and August. [6] Spawning typically occurs in near-shore waters with high salinities. [7] Following the spawning period, the juveniles then migrate to the brackish waters of the nearby estuarine ...
The juveniles have an area of black colour which covers most of the head. As the fish grows this breaks up starting with the lips which turn bluish white and their caudal fins begin to darken to become black. This species, like all marine angelfish, is a sequential protogynous hermaphrodite and the younger sexually mature adults are all females ...
Most species are hermaphrodites, and juveniles of at least some species are capable of reproduction before reaching the adult size and shape. This combination of hermaphroditism and early reproduction enables small populations to grow at an explosive rate.