crab id

Found this crab molt. Any ideas if friend or foe? (about an 1” large, bright red carapace, fuzzy legs)thank you.

Hey everyone, I got a hitchhiker today. Not sure if he's reef safe or not? He's tiny at the moment. Any help would be greatly appreciated. Thanks

My sea urchin was not doing well and losing most of its hair suddenly. I seperated and moved it to refugium. It stopped moving today and when I noticed closely I saw something crawling all over it's body. I've seen this many times but all the while I was thinking it's urchins mouth. It looks...

This carb has made a hole in the sand under all my rocks I would never be able to get him. Should I leave him in or get him out. Is he safe to leave in?

Hey guys. I just picked this guy up at my LFS. Guy said he was a pest hitchhiker so I bought it off him for a couple bucks. His body is probably about 3 inches wide not including the claws/legs. He's pretty big. He's munching on some octopus I just gave him. I bought it for my mantis shrimp...

We have had this mystery crab in our tank for a while now and even with traps have not been able to get him out! Sneaky guy! He has molted so hopefully this will help. He is a little fuzzy but Im pretty sure its not a gorilla crab? One claw is very large compared to the other, he has red eyes...

Ahoy, I would like to know the ID for this crab. Classic question -> good or bad? If other pictures are needed to ID it, let me know which parts of the crab are importatnt. It is sitting in the sump right now just to be sure. Thanks in advance! PS: I named it Karatecrab LOL

Looking for an ID on a hitchhiker crab from my TBS liverock from Florida Maroon Crab with white bands on legs, sharp looking claws, no hair on his body/legs at all. looks like black tips to the claws, but looks totally different from the stereotypical gorilla crabs I've found so far. Sorry...

anyone up for round 2 of Good Crab/Bad Crab from TBS live rock (so Gulf of Mexico)? 1/2cm long

@Lionfish Lair Found this little guy today. Can he be ID'd or is he just too small? Most of all, Safe? Can I keep him? Seahorse Tank safe?Bottom view Top ViewAnd one for good measure ;)

So I ordered a maricultured metallic green torch coral from LiveAquaria and it came with its very own sizable crab. It has hairy legs and green body and claws. I'm thinking it's an emerald mithrax crab, but I want to be sure before I set it loose in the tank. Can anyone confirm it's an emerald...

So im new to saltwater. Ive had planted tanks and even have a 45 gallon ciclid tank now. Just so recently decided to take the plunge into the ocean.. I have a 10 gallon nuvo compleatly basic setup. Still in the cycle phase only had the tank up for a week but when adding live rock i found a crab...