there is a lot of talk about crabs being destructive. i had no problems with hermit crabs. i may be wrong, but i've seen may types of crabs being sold as reef safe by lack of identication or knowlege. i seen small blue stripe hermits being sold as blue legs, and they are hunters. i''ve seen blue-knuckle hermits being sold as blue legs....even those these are generally reef safe, their mature size may cause problems. the red leg hermits are also confused often...i've seen at least 4 types being sold as such. it doesn't help matters that most times it is so small that it is hard to see. be especially wary when you buy them in lots or in package deals...at the prices being sold online, the vendors will find it difficult to pick carefully...don't forget, the vendor already paid for every crab whether they are the real thing or not. at my favorite
lfs, he picks out all offenders carefully before selling. i saw one batch of 200 blue legs...there was actually only about 30 real ones. i felt bad because i had complained about his price before not knowing what he does to ensure i did not end up with a nasty surprise.