Need help with crab, food or bad

[SaltyFarts]

This guy came on my live rock. He was tiny at the time and scampered off. Today I walked by and saw him sitting in the open. Any idea what he is? Can he go back, or does he need to go?

 

[WV Reefer]

This guy came on my live rock. He was tiny at the time and scampered off. Today I walked by and saw him sitting in the open. Any idea what he is? Can he go back, or does he need to go?

Looks like a mithrax crab. Good algae eater.

 

[SaltyFarts]

Looks like a mithrax crab. Good algae eater.

Cool, thank you. My daughter saw him and fell in love so she’ll be happy to hear he’s going back in to work in the clean up crew!!

 

[WV Reefer]

Cool, thank you. My daughter saw him and fell in love so she’ll be happy to hear he’s going back in to work in the clean up crew!!

Always look at the claws when trying to figure out if they are good or bad guys. Algae eaters have flat little scoops on the end of the claw..... bad guys will have sharp points.

Here’s my mithrax crab:

He’s a beast.

 

[SaltyFarts]

Always look at the claws when trying to figure out if they are good or bad guys. Algae eaters have flat little scoops on the end of the claw..... bad guys will have sharp points.

Here’s my mithrax crab:

He’s a beast.

Thanks for the tip! I’ll keep that in mind. Wow, he is a big boy!