Nassal served as the rockwork contractor for the Dolphin Encounter, a unique opportunity to train, feed and touch playful Atlantic Bottlenose dolphins inside a 200,000 gallon habitat; Penguin Passage, a rocky habitat and 8,000 gallon pool for a colony of Magellanic penguins; and Stingray Bay, a 12,000 gallon pool.

Six Flags Discovery Kingdom has brought a touch of the tropics to Northern California with Ocean Discovery, a Caribbean themed ocean experience that allows guests to interact with dolphins, stingrays, warm-weather penguins and sea lions. Ocean Discovery is the first and only place Northern Californians can interact with these amazing ocean mammals first hand.