The relict splitfin (''Xenoophorus captivus'') is a species of splitfin endemic to the Pánuco River system in Mexico. It feeds on

algae Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular mic ...

. This species grows to up to in length. It is found in the

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 ...

trade. It is the only known member of its genus.

References

Xenoophorus Goodeinae Freshwater fish of Mexico Endemic fish of Mexico Pánuco River Natural history of San Luis Potosí Natural history of Tamaulipas Natural history of Veracruz Endangered fish Endangered biota of Mexico Endangered fauna of North America Fish described in 1924 Taxa named by Carl Leavitt Hubbs Taxonomy articles created by Polbot {{Cyprinodontiformes-stub