At a LFS I noticed some cute little 1/2 to 1" translucent shrimp with slightly blue grey tails. The label read "algae eating shrimp" and the guy didn't have much information about them. Does anybody know what they might be? How big they'll get? Will dwarf gouramis or weather loach murder them? IF they aren't ammano or ghost shrimp, might they be a species that will cause problems in my tank or should I feel safe with these little guys?