[hdtran]

Pistol shrimp are not bad. They burrow in your substrate, and eat pods. They mix up your substrate.

Mantis shrimp are predators. When small, they eat pods, worms. Then, they get larger. When larger, they begin to go after feather duster worms, barnacles, hermits, crabs, other shrimp, snails, etc. When they get quite large (depending on the type of mantis), they may well go after your fish for food.