Hemigrammus ulreyi

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Hemigrammus ulreyi
Hemigrammus ulreyi.JPG
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Characidae
Genus: Hemigrammus
H. ulreyi
Binomial name
Hemigrammus ulreyi
(Boulenger, 1895)

Hyphessobrycon ulreyi Boulenger, 1895

Hemigrammus ulreyi, commonly known as Ulrey's tetra, is a Paraguayan tropical aquarium fish from the family Characidae named in honor of the biologist Albert B. Ulrey. It was originally named Tetragonopterus ulreyi in 1895.[1]

In the aquarium[edit]

This aquarium fish suitable for a community aquarium can reach 5 cm (2 in) in length and does well at temperatures of 21 to 29 °C (70 to 85 °F).[2]


The breeding size is 4 cm (1.6 in). Dr. Herbert R. Axelrod, editor of Tropical Fish Hobbyist Magazine, and Dr. Leonard P. Schultz, retired curator of fishes at the Smithsonian Institution, wrote that the breeding of this species is a problem, since the species is nearly identical to Hyphessobrycon heterorhabdus and is difficult to spawn.[2]


  1. ^ Froese, Rainer; Pauly, Daniel (eds.) (2014). "Hemigrammus ulreyi" in FishBase. August 2014 version.
  2. ^ a b Dr. Herbert R. Axelrod and Dr. Leonard P. Schultz, Handbook of Tropical Aquarium Fishes (Neptune City: T.F.H. Publications, Inc., 1983), 226.