The Hawaiian name for dolphin is nai'a, and refers to all species of dolphins found in Hawaiian waters. Four species of dolphins are regularly found in the waters around Hawaii. They are the Pacific bottlenose dolphin, the Rough-toothed dolphin, the Spotted dolphin and the Spinner dolphin. Other dolphin species have been known to pass through the islands but are relatively rare. The two most popular species of dolphins located in Hawaiian waters are the bottlenose dolphins and the spinner dolphins.