Redtail Moenkhausia/Cope's Tetra Moenkhausia/Hemigrammus copei

The Redtail Moenkhausia, also called Cope's Tetra (and a Hemigrammus), is a Tetra native to much of the Amazon Basin and some of the Orinoco Basin. It has a bright red tail and bright red adipose fin. The fish grows to some 6-7 cm long.