Other species popularly kept include the grey seal and harbor seal. It is one of the four harbor seal rookeries remaining along the Southern California coast. Many birds and harbor seal live in this area. Other species popularly kept in captivity include the grey seal and harbor seal. Marine mammals include sea lion, beluga whale, harbor seal, and porpoise. This habitat is frequently occupied by both the Steller sea lion and the harbor seal. Marine mammals include sea otter, harbor seal and Steller sea lion. The waters off Sequalitchew Beach are inhabited by harbor seal and gray whale. There it has become an important prey item for the harbor seal ("Phoca vitulina"). This location, particularly on Strawberry Spit, is a winter haul-out area for the Harbor seal. The waters off Sequalitchew Beach are inhabited by harbor seal, marbled murrelet and gray whale. The harbor seal show opened in 1990, and is still showing daily. "Hoover", a captive male harbor seal demonstrated a convincing case of vocal mimicry. Marine mammals include the grey seal ("Halichoerus grypus") and harbor seal ("Phoca vitulina").