Emerald catfish

 

The emerald catfish (Brochis splendens), emerald brochis, emerald cory, green catfish, or shortbody catfish is a tropical freshwater fish belonging to the Corydoradinae sub-family of the Callichthyidae family. The fish has appeared on a stamp in Brazil. This species is sometimes called the emerald cory. Brochis were separated from corydoras catfish by their longer dorsal fins with tall spiny first rays

 

From Wikipedia