following along.... I've got the exact same crab, came on a zoo colony.... I've also been wondering if I should be worried. I have seen him with zoos in his claws but also algae..... dunno what to make of this because I later see the zoos on the sand bed so I don't know if he's just incidentally chopping them while trying to get the macro (cualerpa that also came on the zoo colony).
Only reason why I haven't just gotten rid of him yet is because his colors are smashing!
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