ive had hermit crabs for the past 3 years. ive had between 1 and 10 at the same time. they are great pets; quiet, social and non-aggresive! it creeped me out the first time one of 'em molted their skin. i thought the group mulitated one of em, so i counted them to see who it was. but there was still the same number of hermies in the tank. so i was freaked until i took out the 'body' from the habitat and discovered it was only a skin. oooooo Beware: The Ghost Hermie! oooooo