HCA: Hermit Crab Association

I'll see if I can get a better picture. Thanks.

We've had our two crabs for a few weeks and are still buying supplies. I am still trying to ID them. So far I have only got good pictures of the biggest one. Any help would be great. Thanks. Type? Gender? https://app.photobucket.com/u/Sodisco420/p/e3ee383c-10d5-4ba6-94db-44f573eda7d2 https://app.pho...