Crab ID Please

[Gerrit]

Hi Guys/Gals,

Found these two crabs on my live rock. What are they? Should I keep them or get rid of them?

Thanks
Gerrit

This one about 1cm wide

This one about 3cm wide

 

[phat]

kill kill kill

 

[KevinW]

Hi Gerrit, You need to get them out. These grow reasonably large and can attack your fish, especially at night. Had a number of these in my system (caught in Durban harbour) and they rapidly became a problem.

 

[Mekaeel]

toothpick gerrit!

 

[Gerrit]

Thanks Guys, will have to do it then. Don't like it, but I suppose have to