The biological family Cichlidaea is one of the most fascinating examples of animal evolution on Earth. Convict cichlids are a widespread, well-known species within this unique group. Convict cichlids ...

Evolutionary biologists describe a new gene in the Central American Midas cichlid fish and identify a variant caused by a 'jumping gene' (transposon). This variant of the 'goldentouch gene' is most ...

There are concerned, overprotective parents, and then there are cichlid fish. After a male cichlid fertilizes the female’s eggs, she holds her entire brood of embryos inside her mouth for two weeks ...

In bony fish the swim bladder primarily serves for buoyancy. Moreover, in many species it also possesses acoustic functions: it plays a role in sound production and improves hearing in numerous ways.

Cichlids are a striking type of freshwater fish with over 500 species. They're usually found in warmer regions and in various bodies of water, including ponds, rivers, lakes, and streams. Most species ...

Marine photographer Angel Fitor first saw endangered cichlids in a pet shop. Now his award-winning images could help save these fish Lake Tanganyika is the world’s longest freshwater lake. It ...

A new study that looked at gut length variation between cichlid fish species found that some of the genetic loci for the trait are sex-specific even though males and females of the same species have ...

Sometimes individuals of the same species differ greatly in their shape or colouration. Scientifically, this phenomenon is referred to as "polymorphism". The 13 fish species that belong to the Central ...