Does any one know what these two crabs are?
 

http://imgur.com/a/iLROT

Sorry about the picture quality. It was taken on a phone.

Bottom one looks like a gorilla crab...not reef safe!!!
Top pic is too crappy to tell.

first one is bluricus crappicticus , or it might be a porcelin crab if i squint and look at it sideways judging by the shape and color. The second is a gorilla crab and is bad news.