Sorry best picture I can get for now. I'm running out to dinner and noticed this guy came out during tonights feeding. Looks to be red, possibly some purple? I don't see hair, but its hard to make out.
smooth not hairy you are good. if it is hair you better get it out the normal acro crab i see are white with a single racing stripe across the shell. my rule is when in doubt throw it out
I have a pair of acro crabs in one of my colonies but they're tiny and hide most of the time. Recently I got a colony at Vivid that had a bandit crab. I had the colony on the sandbed acclimating and that guy moved from the front corner of the tank to the rock wall in the back, climbed up about 16" and over about 18" and moved right into my birdsnest. Now every time I turn the pumps off and start feeding the tank I see little claws waving above the birdsnest trying to catch food. It's hilarious.