What are these things?

[Rodolfo Garcia]

Hello guys, just wondering what these little guys are. I bought a conch at a lfs and these things were in the bag. Any ideas? Safe to add to my tank?

 

[Instigate]

Brine Shrimp, good live food.

 

[DangerDave]

Mysis?

 

[Instigate]

Mysis?

Mysis and Mysid shrimps have their appendages along their belly, not out the sides. Definitely Brine shrimps.

Mysis:

Brine: