Hitchhiker carb identification

[Rowan Savage]

Hi, I just picked up this frogspawn but it has this crab hiding on it. It is covered in algae has eight legs and is a light brownish colour. Is it harmful to fish or coral? If so should I just put it in my Fuge any help is appreciated.

 

[Rowan Savage]

More pictures if it helps

 

[KJ]

Look like Teddy bear crab ( Xanthidae sp.) Remove him.

 

[Rowan Savage]

Thanks

 

[Nano925]

Decorator crab? i do think it is a teddy bear!