''Apistogramma nijsseni'' is a species of

cichlid Cichlids are fish from the family Cichlidae in the order Cichliformes. Cichlids were traditionally classed in a suborder, the Labroidei, along with the wrasses ( Labridae), in the order Perciformes, but molecular studies have contradicted this ...

fish, endemic to highly restricted local black water habitats in the Quebrada Carahuayte, a small stream in the

Ucayali River The Ucayali River ( es, Río Ucayali, ) is the main headstream of the Amazon River. It rises about north of Lake Titicaca, in the Arequipa region of Peru and becomes the Amazon at the confluence of the Marañón close to Nauta city. The city of ...

drainage, southern Peru. The male reaches a maximum length of , the female remaining somewhat smaller. ''Apistogramma'' brooding females assume a bright yellow and black aposematic coloring: in ''A. nijsseni'', unusually, a healthy, unstressed female retains this coloring. The species is popular

aquarium An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...

fish amongst dwarf cichlid hobbyists,Linke H, Staeck L (1994) ''American cichlids I: Dwarf Cichlids. A handbook for their identification, care and breeding.'' Tetra Press. Germany. though it does not often appear in the general pet fish market. Nijsseni female

The species is named after the Dutch ichthyologist

Han Nijssen Han Nijssen (1935– 2013)H. Nijssen, 1935 -
at the UvA Album academicum was a Dutch

''Apistogramma nijsseni'' Kullander
- Naturhistoriska riksmuseet

References

* nijsseni Freshwater fish of Peru Fishkeeping Fish described in 1979 Taxa named by Sven O. Kullander {{Cichlidae-stub

See also

References