San Diego Beach Secrets

It is that time of year again! The grunion is here! If you recall, in 2020,  Californians could not witness the grunion of March and April, as we were not allowed anywhere near the water. Well, this year is different, and I, for one, am heading down this month to check them out in person. Below, I present the 2021 grunion and the updated 2022 grunion run schedule for Southern California.

Important- New Grunion Fishing Regulation 2022 Update!

What is a Grunion, and How Do They Run?

The grunion (Leuresthes tenuis) are small silvery fish between 5 to 7 inches long that live about 3 to 4 years. Each year, the grunion comes onto Southern California’s beaches between March and September to spawn during the Full and New Moons.

The female grunion catches a wave, digs a hole, and waits for males to touch her. Once touched, she will release her eggs, and the males cast their milt (sperm) on her body, which then flows down onto the eggs.

The process happens quickly, and up to eight males may fertilize each female. Interestingly, the female grunion may be out of the water for over five minutes! Once the male is done, he will catch a wave back into the ocean.

Each grunion run lasts four consecutive days when the tide is at its highest and longest. The eggs are buried in the sand for two weeks until the next high tide arrives. When the larvae become agitated by the waves, they hatch and are taken back into the ocean by the tide.

#April, May, and June are peak spawning months, so only observation is allowed.

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