i personally dont like hermit crabs ( or any crabs ) for this reason. they tend to rip snails from their shells only to find they didnt want that shell. even if there are empty shells on the bottom of the tank for them. this is just how i run my tanks. snails and/or shrimp only.
Originally Posted by ladayen
I would expect the crabs to eat the shrimp no?
pistol shrimp can hold their own, id say esp. when they pair with the goby as they work as a team. by this, i wouldnt suggest adding something like this to a busy predator tank ( or any invert eating tankmates ) but in a reef enviroment ( or even a selected fish only ) i think they make a great add personally. the shrimp will do the digging while the goby will do the watching. the entire time the shrimps outside the cave he will keep atleast 1 antenea ( sp? ) on the fish. any trouble and they retreat. the shrimp will gather shells,rocks, and things to decorate inside and maybe even the door of their home. very fun to watch these guys IMO.
this is however if the two find eachother to hold this kind of relationship. in a 10 gallon tank i think they will find eachother fine.