Thayeria boehlkei is known in the aquarium trade variously as hockeystick tetra, penguin tetra, penguin fish or blackline penguinfish, after the black markings on its body. It grows to about 3 inches (7.6 cm), and hails from the Amazon and Araguaia river basins of South America. Thayeria obliqua and Thayeria ifati are related species which share similar black markings and also are referred to as “penguin fish”.
Thayeria boehlkei is known in the aquarium trade variously as hockeystick tetra, penguin tetra, penguin fish or blackline penguinfish, after the black markings on its body. It grows to about 3 inches (7.6 cm), and hails from the Amazon and Araguaia river basins of South America. Thayeria obliqua and Thayeria ifati are related species which share similar black markings and also are referred to as “penguin fish”.