I had one years ago that also had loads of personality. He loved carrying gravel around in his mouth and then spitting it out in his special place in the corner. Once in awhile, I would put some feeder goldfish in there for him and his tankmates (panther grouper, snowflake moray eel). He quickly learned to kill them all as fast as he could, just taking one bite out of their bellies, and then leisurely go back and feed as he felt like it. The grouper and eel didn't mind freshly killed food. I never felt threatened when my hand was in the tank, but he could definitely take a chunk out very quickly. I also had pirana (sp?) but they were pussies compared to this guy. He finally gorged too much, burst his stomach, and died.
