Spawns en masse above the waterline on beaches during highest tides of the spring and summer months. Both males and females ride in with large waves and are left exposed on the sand when the water recedes. Females burrow tail first into the sand to deposit their eggs, and attending males fertilize the eggs as they are released. After spawning, adults return to the sea. They are capable of spawning numerous times. The eggs hatch in about two weeks, upon being agitated by another high tide. Buried grunion eggs provide food for shore birds, crabs, isopods, and beetles.
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