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Sure at the end of the day they're all opportunistic omnivores. I mainly wanted to know if he would get huge and directly aggressive like certain strains of hermits that aren't Scarlets and blue legsCrabs are not safe...
I get that. I have always been a "risk it for the cool invert" camp if it's not particularly aggressive and generally okay. I've found crabs are pretty well behaved (even my old hitchhiker gorilla) if the tank is well-fedSo, full disclosure, I do have 4 resident porcelain crabs in my 25 gallon lagoon. Filter feeders with claws makes me go , "Hmmmm." But so far so good. Also, they were hitchhikers. I would not BUY a crab.
porcelains are totally safe. They don't even really use the claws for anything except a show of force if somebody encroaches. But they stopped even doing that when they got used to the rest of the inhabitants for me at least. They don't even bother my 1/2" masked gobies which occasionally swim right up to the crabs. Also no aggression with a coral banded shrimp or any snails, corals, or hermit crabs.So, full disclosure, I do have 4 resident porcelain crabs in my 25 gallon lagoon. Filter feeders with claws makes me go , "Hmmmm." But so far so good. Also, they were hitchhikers. I would not BUY a crab.
Small hermits can't possibly do much damage. They may attack snails here and there but it's not like it will cause a nightmare overnight.

