Uso??? (Unidentified Swimming Object)

[Twizted1]

Unidentified swimming object. Was doing some maintenance in the tank today. Trimming the xenia & something went swimming out of the rocks. I didn't get a good look @ it. I am sure it wasn't a pod. It was larger than the largest pod in my tank. And it swam more like a shrimp. It was very clear from what I got to see of it before the green wrasse ate it. It was big enough it took him a couple trys to get it down. It all happened so fast I couldn't get a good look @ it. So my question is. Could I have some kind of shrimp in my tank? I never put any live shrimp in there other than the 2 blood shrimp. Any thoughts?

[lazylivin]

It is most likely to be mysid shrimp

[Twizted1]

Not sure how it got in there. Thats a good thing, correct? After looking @ some pics, I think thats what it was.

[lazylivin]

They come in with your live rock. They are good, eat leftover food and fish like to eat them.