''Hemigrammus ulreyi'', commonly known as Ulrey's tetra, is a

Paraguayan Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...

tropical aquarium fish from the family

Characidae Characidae, the characids or characins is a family of freshwater subtropical and tropical fish, belonging to the order Characiformes. The name "characins" is the historical one, but scientists today tend to prefer "characids" to reflect their st ...

named in honor of the biologist Albert B. Ulrey. It was originally named ''Tetragonopterus ulreyi'' in 1895.

In the aquarium

This aquarium fish suitable for a

community aquarium Community aquaria are tanks that are designed to contain more than one species of fish. Most commonly they include a variety of species that do not normally occur together in nature, for example angelfish from Brazil, swordtails from Mexico, and ...

can reach 5 cm (2 in) in length and does well at temperatures of 21 to 29 °C (70 to 85 °F).Dr. Herbert R. Axelrod and Dr. Leonard P. Schultz, ''Handbook of Tropical Aquarium Fishes'' (Neptune City: T.F.H. Publications, Inc., 1983), 226.

Breeding

The breeding size is . Dr.

Herbert R. Axelrod Herbert Richard Axelrod (June 7, 1927 – May 15, 2017) was an American tropical fish expert, a publisher of pet books, and an entrepreneur. In 2005 he was sentenced in U.S. court to 18 months in prison for tax fraud. Early life Axelrod was born ...

, editor of '' Tropical Fish Hobbyist Magazine'', and Dr. Leonard P. Schultz, retired curator of fishes at the

Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums and education and research centers, the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge". Founded ...

, wrote that the breeding of this species is a problem, since the species is nearly identical to ''

Hyphessobrycon heterorhabdus ''Hyphessobrycon heterorhabdus'', the Belgian flag tetra or flag tetra, is a species of characid fish from Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South Am ...

'' and is difficult to spawn.

References

{{Taxonbar, from=Q357574 Hemigrammus Tetras Taxa named by George Albert Boulenger Fish described in 1895