I got 4 of them with my cleanup crew from this site, very neat looking crabs aren't they ? They stayed in the reef until very recently, now they pretty much are out during the day with everyone else. Took about 6 weeks for them to start doing that. They have good eyesite as well, if you venture too close to the glass, they will scury away. Another interesting crab was my sally lightfoot. Very active and mobile. Today I looked in and saw her shell laying upside down - sad - but not - it was the "shed". She came out and I saw her intact !! Hard to get used to this molting thing, my coral banded shrimp did the same thing and I would have bet that was dead also.