Is this guy moving ?

[Allen glover]

See that little guy center rleft ? Well it and another thats out of shot wasnt there yesterday. It was on the purple rock with all the others.
Im ptetty sure I'm being stupid by asking this but these things cant move by themselves can they? Surely Its one of the many crabs I have in the tank thats doing it. Also do you think it will survive. It looks happy enough

 

[James M]

Palythoa. They can’t move and crabs can’t move them either unless it’s eating it

 

[Allen glover]

Palythoa. They can’t move and crabs can’t move them either unless it’s eating it

Thanks for that
Just been reading up about palythoa. Should I be worried about toxicity to my tank or to whatever is moving it. Suspect my hairy crab. he has been acting pretty shifty lately

 

[James M]

No. Just don’t sniff a freshly cut one or boil a rock with them on it