Acropora Crab ID needed

[returnofsid]

I picked up a small Acropora maricultured colony and it came with a tiny crab in it. Usually, I remove and destroy any and all crabs, if I ever find any...lol. However, I'm almost certain this is one of the beneficial variety, generically referred to as Bandit Crabs. I figured I'd get some more opinions. Unfortunately, I wasn't able to get a very good picture of it. The entire crab is an "ivory white" color, except for around it's eyes/face. The claw tips are the same "ivory white" color.

 

[dzhuo]

It's a Tetralia; either Tetralia glaberrima (that would be my guess) or Tetralia nigrolineata.

Nice find!

 

[returnofsid]

It's a Tetralia; either Tetralia glaberrima (that would be my guess) or Tetralia nigrolineata.

Nice find!

Googled those and I think you might be right! So, I assume these are the GOOD crabs, right?

 

[dzhuo]

Googled those and I think you might be right! So, I assume these are the GOOD crabs, right?

They are. At least we have not found any evidence they are harmful to the host at all.