yes, emeralds will sneak up to fish while their sleeping to kill them if they aren't eating well. crabs generally aren't great in aquariums, I wouldn't put one in mine.
Absolutely they will eat fish. Either put it in the sump or bring it back to the LFS I had one eat two royal grammas. They will grab them where they sleep.
And how do u catch him? New to hobby and a little nervous about grabbing him he got me once already didn't hurt that much just scared the crap out of me
The only hermits you want are the scarlet legged. Any others especially the blue legged are murderous bastards :hammer: If you have any of them they go in the sump with your emerald crab.
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