Grass shrimp are small shrimp. They make a fantastic freshwater and saltwater fishing bait. Bluegill, largemouth bass, crappie, white perch, yellow perch, hybrid striped bass, rainbow trout, speckled trout, snook, bluefish, striped bass, redfish, croaker, flounder, snapper and numerous other fish love to eat grass shrimp. They make great additions to aquariums. Grass shrimp are sold for $2 per dozen.