Amano shrimp are the 1st string of the tank cleanup crew, best algae eater. Native to Japan, Taiwan, and parts of coastal China, where it inhabits clear, moving freshwater rivers and streams with rocks and abundant vegetation where they can breed, and find hiding places that keep them feeling secure. Adults live in freshwater, but larvae are swept downstream to brackish waters where they develop before moving back upstream as juveniles. This life cycle is why breeding them in captivity is rare, and nearly all aquarium amanos are caught in the wild.