Someone was just admiring my office tank, and got to talking about thier goldies. The have 2 comets (about 5 inch)in a 30 gal. (better than a bowl). They said they got a small crab of unkown species. One day the crab was gone. A week later one of thier goldies seemed to have a growth near its stomach. Pregnant mabey? No babies after 2 months but the growth continued to get bigger. One morning the "pregnant" fish was found floating with its innards exploded all over, and the crab was back. Can a crab(any kind?!) live in a fishes stomach for a matter of months, only to "break-out" and continue its normal life? I've read that some crabs need to surface for fresh air, but does that apply to all species? I would imagine ANYTHING in a stomach for that long would eventually be digested. Any thoughts?