[header] How to identify and care for lionhead goldfish [title] Check the fish you are preparing to buy, or if it is already in your tank, observe it. [step] Lionhead goldfish have the following as physical traits : [substeps] Lionhead goldfish completely lack a stabilizing dorsal fin. If your fish has a dorsal fin, it is most certainly not a lionhead. 
Lionhead goldfish are round and " fat " relative to other goldfish. Lionhead goldfish grow a fleshy " growth " on the top of their head.