This crab is a hitchhiker. Does anyone know what he is? He looks a lot like my emerald crab...only red. He started off very small...and has definitely grown some. I'm having trouble getting a decent photo of him. He doesn't show his face much.
I looked...it doesn't look spotty or splotchy or anything like the trapezia crab. At least, not that I've noticed. It's still pretty small...but I think it's just red with hairy legs.
It may be an emerald crab.
Look at the tips of the claws.If they are pointed and sharp,you know he's a bad dude and needs to be pulled out.If the claw tips are shaped like little cups,then he's fairly safe.