Spinner dolphin records are heaviest around the Big Island’s Kona coast and extend across Kauaʻi, Maui, and Oʻahu, tracing the sheltered bays this species relies on to rest during the day. Kealakekua Bay on the Big Island and the Waiʻanae coast of Oʻahu are among the best-known resting grounds in the state, though the dolphins themselves head back out to open water each night to feed.
Spinner dolphins earn their name from the twisting, spinning leaps they perform at the surface, a behavior nobody has fully explained though it may help shed parasites or simply communicate with the pod. By day they gather in calm, shallow bays to rest in loose groups, then move offshore after dark to hunt small fish and squid that rise toward the surface at night.
With nearly 1,700 combined iNaturalist and GBIF reports and a sighting logged as recently as July 2026, spinner dolphins are among the most frequently recorded marine mammals in Hawaiian waters. Reports appear in every month of the year, matching a species that keeps the same daily rest-and-feed rhythm no matter the season.
