Grunion are small, slender fish with bluish-green backs and silvery sides and bellies. Their snouts are bluntly rounded and slippery. They have no teeth as adults. Silversides differ from true smelts of the family Osmeridae in that they lack the trout -like adipose fin.

California grunion are small, silvery fish found only along the coast of Southern California and northern Baja California. Unlike other fish, grunion come completely out of the water to lay their eggs in the wet sand of the beach.

For those not familiar, Grunion are a species of fish that leave the water at night to spawn on beaches during the spring and summer months throughout Southern California (San Diego to San Luis Obispo County). For more specifics see our list of the best grunion run beaches in California.

Want to learn what a grunion run is? This info will help you understand the fish, their "runs" and go on an official grunion run in California.

2025年3月11日 · California grunion are returning, so tell a friend! The California grunion spawning season begins in March and continues all the way through the end of August. Grunion spawning events are also called grunion runs. Now, why would …

Grunion are small slender fish with bluish green backs, silvery sides and bellies. Their average length is between 5 and 6 inches. Early Spanish settlers called this fish grunion, which means grunter. This term has been anglicized into grunion. Grunion are known to make a faint squeaking noise while spawning.

2023年4月7日 · Grunion are small, Southern California fish most famous for one thing: having sex on the beach. Every March to September, they can be spotted leaving the ocean in droves to spawn on the beach...

Grunion, (species Leuresthes tenuis), small Pacific fish of the family Atherinidae (order Atheriniformes). The species is found in the Pacific Ocean along the western coast of the United States. A unique feature of the grunion’s breeding biology results in its …

What is a grunion? California Grunion are a species of marine silverside fish found only along the coast of California and northern Baja California. Another species, the Gulf Grunion, is found only at the top of the Sea of Cortez in Baja California, Mexico. When do the grunion run? The 2025 season is March 1 - August 31.