Acestrorhamphidae

Costello tetra

Hemigrammus hyanuary

Four Point Four Centimeters Acestrorhamphid Fish of South American Waters

• Tropical
• Southern Hemisphere
• Regional distribution
• Freshwater fish
• South America
• Small
• Tropical fish

Hemigrammus hyanuary, the January tetra or Costello tetra, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae. This fish is found in the Amazon Basin in South America. This species is uncommonly found in the aquarium trade.