Watch the silvery fish come up on the beach to spawn! Learn about the interesting mating rituals and growth of this curious fish. The Aquarium opens at 8 pm and an auditorium program begins at 9, followed by guided observation at the beach. Warm clothing and a flashlight are recommended. April and May are closed season. March, June and July are open season, when grunion may be taken by hand only and a valid California fishing license must be displayed if you are 16 years or older.