I'll post on just what I've read about red wolf fish, so you ight want to wait til someone that has actually kept one responds. I've never kept one, but seriously considered getting one at one point.
Food: I'd say anything meaty, uncooked market shrimp, white fish filets, bloodworms, beef heart, etc.
Length: About 8in
Temperment: Can't really comment on this.
I hope this helps! Good luck!