And for some reason I think he might have been attacking my congo tetras at night... lost two of them in the first 4 days he was in the tank... and I would see him take them down to the bottom (once dead) and eat them.
Its really cool to watch them eat 'live' food like this though, he grabs [whatever] and shakes vigorously with all of his body to try to 'tear' pieces off.
Otherwise I just feed him bloodworms and Shrimp. Those he juts sits there and bites casually.