[Snappy]

I think I've got a pistol in my tank. I can see a big white claw through a hole in a rock where it is hiding, however it has smaller pincers on the end. Reminds me of Popeye with the big fore arm and small hand. Does that sound like a pistol to any of you more experienced guru's out there?
All the signs seem to point that way including the clicking noises.
Greg