"Pods are good" or "your tank needs pods." So what are they? They are tiny little bugs running around on your rockwork, on the glass and in micro / macro algae. Usually people see amphipods in their system, which are small and look a little like tiny shrimp. Even smaller are the above, which resemble opaque ants. This Isopod may be food to many fish, including wrasses. Usually these tiny guys hitchhike in on LR or corals, and in a predator-free zone they are quite interesting to observe. Reef-safe.