Is it the erythrinus erythrinus? Otherwise commonly known as ery ery, rainbow wolffish?
If yes, they are the smaller of the wolf fish, and are much less aggressive. But that doesn't mean they are not aggressive. Just that it is on a smaller scale.
What type of information do you want?
If I am not wrong, they grow to about 20cm. Their diet can be any live food. They can be trained to take dead meat too. I have heard they can be trained to take pellets. But I have not tried it myself. So I won't comment too much on that.
Video of my ery ery
You can see those jagged teeth if you look closely enough.