ok guys, I need some help. I went to the fish store to pick up my DWARF puffers, and I saw them in the tank. To make this brief, the fish expert is a freakin moron. First, the puffers were labeled, Leopard puffers, said to prefer salt water, and grow up to 6 inches. The scientific name is Tetraodon Fluviatillis, they look like GSP, but everyone at the store says they are Dwarfs and the expert says they are just Leopard Puffers....