What are these little bug type things?

[tubz]

Just saw these for the first time in my tank on the overflow cover. Any ideas what they are?

 

[little_fish]

pods! excellent thing to have in your tank

 

[tubz]

Ok. Where do they come from and what do they do?

 

[little_fish]

they came in on your live rock. They a really good micro crustaceans, eating detritus or algae and they provide free fish food

 

[chuck78]

+1 fish

 

[Smitty]

+2 lil fish