Do a search on marble goby in the "other monster fish" forum. Also google under the name soon hock. They get at least 2' long, are a popular food fish, and are not to be trusted with anything at all smaller than they are. I had one that (at 10") ate an 8" LMB, and would eat 6" bullheads. It also ate catfood, hotdogs, M+Ms, and tried to eat the heater. It also tried to eat my hand a couple times when it was a bit bigger. When they do move, they move very suddenly. Don't be suprised if one morning it is the only thing left in the tank.