The Amano shrimp is native to Taiwan and Japan and can grow up to 2 inches in length. It goes by many names, including Japanese shrimp, Japanese swamp shrimp, Japanese algae eaters, Japonica shrimp, algae shrimp, and Yamato shrimp.  A genuine Amano will relentlessly search out algae and other food in every crack and crevice, while similar shrimp will be lazy by comparison. They will feel more secure and at peace if you give them plenty of plants and other places where they can hide. You should keep the water temperature between 72 and 78 degrees Fahrenheit, and maintain the pH level between 7.2 and 7.5.