Is my Watchman Goby a killer?

[ScooterMom]

I suspect that my watchman goby is not the gentle fish he appears to be. In fact, I think he is killing the shrimp in my tank.

I placed a cute little red and white pistol shrimp in his tank. The shrimp headed toward the goby's burrow. The last time I saw the pistol shrimp, the goby had seized it in its mouth and flung it across the tank. It was never seen again.

I moved the goby to a smaller tank with a peppermint shrimp and a larger pistol shrimp. About a week ago I found the peppermint shrimp dead and yesterday I found the pistol shrimp in peices!

The only other residents in the tank are two other gobies, both much, much smaller than the watchman and very shy. Much as I hate to believe it, I think the watchman goby has been wiping out its room mates.

 

[treylane]

I've seen shrimpgobies kill pistols before, though never the reverse. Also haven't seen shrimpgobies go after peppermint shrimps either, but if they can kill the pistols they're certainly capable of killing wussy peps.