''Hemigrammus ulreyi'', commonly known as Ulrey's tetra, is a Paraguayan 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 ''Tropical Fish Hobbyist Magazine'' (abbreviated as ''TFH Magazine'') is a bimonthly magazine geared to hobbyist keepers of tropical fish, with news and information on a variety of topics concerning freshwater and marine aquariums. The magazine was ...

'', 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. Description This fish has an elongated and laterally compressed body, and has red-colored eyes and a lateral stripe composed of bl ...

'' and is difficult to spawn.

References

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