Tiny Crab

[snail]

I have no idea what they are. They seem to like colt coral. I think they may eat the coral, just can't tell and this is my first coral. They came with. LFS thought it was just a molt hanging on.

It was alive when I put it in the tank, then found a second one in the coral. This piece of coral is smaller than peanut with shell. Small one is penny sized overall.

click picture, the one I see looks really bad (edit)

 

[Sadielynn]

I am thinking a porcelain crab or an acro crab ?

 

[Kurt_Nelson]

If I'm seeing it right, looks like it's got an awful big claw for a little crab. Isn't that normally not a good sign? Big claw = probably something you don't want?

 

[MT79]

It looks kind of similar to an acro crab, but on a soft coral...? I never saw one of those before. As you said "snail", it could be eating the coral. Watch closely, and if I come across anything I'll post back.