The tank does look too small to be a 90 gallon, but with an oscar that size I guess it just messes with your mind. Nice looking Oscar though. Even though if I had that few of fish in a 90 gallon tank, it would drive me absolutely nuts
well he is a predator and if you've read anything about o's in the NW cichlid forum, anything that can fit into their mouth will end up there. Sorry to hear you gave him away. Hopefully you found a good buddy who can take care of it or a good lfs who make sure it gets a good home