These snails are in high demand for fresh water, brackish water tanks, and ponds. They can be converted easily to salt water and are extremely hardy snails. These snails are not a variety that will crawl out of your tank. They have a big appetite for algae and will be found on glass and on rocks. Many of the Olive nerites that we have collected have barnacles on their shells. We have had years of experience keeping these snails, but have not had them in stock for quite a long time. We are happy to offer them again!