The Gold tetra (Hemigrammus rodwayi) is a member of the Characidae family.  These peaceful schooling fish come from the coastal floodplains of South America and have become a very popular aquarium fish species. These fish are beautiful and have their very own natural protection system. They secrete an enzyme called Guanin from their scales to protect the fish from skin parasites while giving the fish its distinctive golden color. These little fish are renowned for their bright, metallic golden color. The fish are best kept in small schools of at least six. These are very shy fish, and if you…