Weird shrimp like thing

[pyly220]

I bought a live rock today just to get nice clam that was on it. I examine it before adding it to my fish tank, and I found this lil guy it looks like a shrimp but is not a shrimp and is very fast. Any help would be awesome. Thank you guys!!!

 

[carried]

I'd say it looks like an amphipod.

 

[pyly220]

I hope so. I have being doing some research and comparing pictures and it looks like a shrimp mantis and I am crossing my fingers because I don't know if there were more in that rock.

 

[Adio800]

+1 on amphipod

 

[Tony Gill]

Yes, amphipod.

 

[pyly220]

Ok are they safe to keep or no. Than you!!!

 

[Adio800]

Yes they are good to have!

 

[crister13]

They help a lot with cleaning up the tank. How big is he?

 

[pyly220]

Is about 1/2 an inch and is like green in color that's why I thought it was a baby shrimp mantis.