Please Help Me Id This

[Fox 82]

Hi I finally caught the little thing thats been living in a hole under a small Matt of green star polyps. Its very fast darts in and out of the hole, I've found smaller ones all over my tank but this one is much larger and seemed to be making the GSP close when I saw it come out of the burrow. So anyway does anyone know what this is? Thanks

 

[Pistol]

It's an amphipod, good thing.

 

[LIttle Reef Keeper]

Amphipod, good guy!

 

[Fox 82]

Thanks

 

[Fox 82]

This is NOT a good bug! That eat your soft corals.. How do I get rid of them?? This is stupid always another problem lol saltwater sucks