Families can spend a night sitting on Southern California's sandy shore waiting for the legendary grunion run to begin.
The aquarium presentation before the grunion run on this evening is more extensive than on other evenings in the season; families can hatch grunion eggs, learn how to make grunion origami, participate in grunion arts and crafts, watch a classic grunion video, interact with grunion researchers, touch live tidepool animals, and see the many other live animals in the Aquarium.
After participating in the indoor grunion activities, everyone heads to the beach to observe the enchanting fish. During the month of May grunion may be observed, but not captured. Warm clothing and a flashlight are recommended.
Grunion are sardine-size fish of the silversides family, which are among the few species of fish that actually come ashore to lay their eggs on sandy beaches. They are found from Southern California south to Baja California and arrive at night after the high tide around the new moon and full moon. Cabrillo Beach is one of the better places to observe the fish.
April and May are closed season. March, June, and July are open season, when grunion may be caught (by hand only) with a valid California fishing license.