What is this hitchhiker?

[Searchin]

I have them in my tank all the time. The play inside my coral. Are they bad, if so how do I get rid of them?

They are like little shrimp or something.

 

[54seaweed]

looks like a pod there ok to have

 

[Searchin]

Dang I didn't realize they could get that big! I thought this was a baby shrimp or something.

 

[54seaweed]

some can get 10mm