Picture a really big fish with a bad attitude that swims in both salt and fresh water. It's kind of like a tank on fins — all muscled and mean-looking, but with a smile full of teeth that would make a dentist cry. This fish loves to hang around shallow areas, where people like to swim, just because it can. It's the type of creature that thinks being in a kiddie pool is just fine. Also, it probably stinks of danger and has a knack for showing up where it’s least wanted, like an uninvited party guest who’s just there to ruin the punch.