Gold tetra

 ( Hemigrammus ) 

The gold tetra, or Rodway's tetra ( Hemigrammus rodwayi) is a species of small freshwater fish in the family Characidae native to lowland South America, where they are abundant in coastal floodplains. Their name comes from a powdery golden tint on their body that is thought to be caused by internal parasites. Gold tetras are peaceful, hardy, schooling community fish. Gold tetras have been successfully bred in captivity.

The patronym was given by Marion Durban Ellis in honor of James Rodway (1848-1926), a renowned naturalist of British Guiana, who aided Carl Eigenmann’s collecting trips in South America.