Why do these California fish leave the ocean to spawn on dry land?
In short: California grunion are schooling fish that perform a unique ritual: during the highest tides of spring and summer, they emerge from the Pacific to mate and lay eggs directly on the sand. This video explores why these fish risk the beach to protect their offspring from ocean predators.
California grunion, typically six inches long, inhabit the Pacific Ocean from Southern California down to the Baja California Peninsula in Mexico, with smaller populations reaching Monterey and San Francisco Bays. By depositing their eggs in the sand, they escape the many marine predators that would otherwise consume their offspring. The eggs are protected by a tough outer layer that prevents them from drying out or being crushed.
The grunion run is a significant cultural event for coastal communities from Santa Barbara to San Diego, where it has become a multi-generational tradition. While some observers enjoy the spectacle, others take the opportunity to catch the fish by hand. A related species, the Gulf grunion, performs a similar spawning process on the northern shores of the Gulf of California.
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- Summary by Intellect · source: These Fish Are All About Sex on the Beach | Deep Look
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