Live-bearing aquarium fish

As livebearers fish is called the fish species in which the eggs develop in the womb to juvenile fish. During laying of eggs by the female juvenile fish beyond their egg case and are immediately buoyant. Among the fish that bear their young alive to the world, including many Halfbeak that Goodeids and the viviparous tooth carp ( including popular aquarium fish such as guppies, mollies and swordtails ), as well as many sharks and rays.

The development of young fish in the womb is not comparable to that of embryos in mammals. Unlike mammals, there is no placenta or umbilical cord. Only in the Hochlandkärpflingen there is an umbilical -like connection between the embryo and the maternal tissue.

Through the live birth the fry have already reached a relatively far advanced stage of development. They are thus less exposed to enemies helpless. Immediately after birth, they are looking at hiding that offer them as delicate aquatic plants.