BABY BRINE SHRIMP... they'll LOVE IT.. and they grow very quickly... but before you sell them that is if your going to try to ween them because if they are only use to the brine shrimp they might not eat anything else at the local lfs in your area which tends to make them die off... which in turn makes them less desireable to the local lfs... so try to ween them after the first week or so onto finely crushed FLAKE!! <3