There are a ton of different varients of wolffish, just like PBass, along with different species. There are many threads about the differences between all the wolves. I used to own a lacerdae that was shipped in from Japan. If you do a search, I'm sure you can find pics of him. Anyways, some of the quickest identifiers is that lacerdae don't usually have a dark stripe along their lateral line. They also have a much more blotched pattern on their body, as opposed to the mala's and aimara's chevron type pattern (>>>> along the body). They also have smaller teeth, a different jaw structure, and they have 4 larger teeth near the back of their mouth on the bottom jaw, as opposed to the mala's 2. Lacerdae are more closely related to aimara, while the black wolves are more closely related to malas. My lacerdae grew from 5-18 inches in about 1 year. Malas don't grow nearly as fast. I'm sure if you do a search, on this forum or the other, you'll come up with a lot of information.