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Some species gather up fertilized eggs in their mouth and keep them safe until they hatch, a process called mouthbrooding. Cichlid. In addition to being mouthbrooders, some species continue to protect their young after they hatch, calling out to them when there is danger, and letting them swim back into their mouth to hold them safely away. [1]
Species of interest to aquarists are almost always members of the family Poeciliidae, most commonly guppies, mollies, platies, swordtails, Endler's livebearer, and mosquitofish. Most of these are ovoviviparous , with the developing embryos receiving no nourishment from the parent fish, but a few are viviparous , receiving food from the maternal ...
[1] [15] Many cichlid species, such as Cichla ocellaris, will also remove underdeveloped eggs from the clutch, a behavior performed by both parents. [15] Many female cichlids also fan their eggs with their fins, especially in slower moving water, in order to increase oxygenation and get rid of build up of undesired materials around the eggs.
The guppy (Poecilia reticulata), also known as millionfish or the rainbow fish, [3] is one of the world's most widely distributed tropical fish and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing. [4]
In the desert isopod Hemilepistus reaumuri, juveniles share their parents' burrow for the first 10-20 days of their life, and are supplied with food by their parents. [38] Finally, some species of Synalpheus shrimps are eusocial, living in colonies with one or a few breeders of each sex together with non-breeders that defend the colony. [39]
In contrast to most animal species, the female only occasionally takes responsibility for the eggs, with males expending most of the time and effort. Male anemonefish care for their eggs by fanning and guarding them for 6 to 10 days until they hatch.
This is a list of fish families sorted alphabetically by scientific name. There are 525 families in the list.
The majority of bivalve molluscs are saltwater species that live in the marine habitats, but a number of families have evolved to live in fresh water (and in some cases, also in brackish water). These belong to two different evolutionary lineages , i.e. freshwater mussels and freshwater clams , and the two groups are not closely related.