Go On A Grunion Run!

What’s a grunion? These little fellas, (Leuresthes tenuis) are members of the New World silversides family, Atheriniopsidae, along with the jacksmelt and topsmelt.  Turns out, they “run” or flop up on the beach during the spring and summer for four consecutive nights following a new or full moon.  During high tide the grunion swim (run) and/or grunt their way as far as they can up on to the sand and then commence to having some intimate fun, and then spawn (lay their eggs).  These occurrences normally happen somewhere between Point Conception California to Point Abreojos, Baja California.

During the open season a fishing license is required for persons 16 years and older to capture grunion. Grunion may be taken by sport fishers using their hands only. No holes may be dug in the beach to entrap them. There is no limit, but take only what you can use. It is unlawful to waste fish.

Some of the best runs occur at our local beaches in Del Mar, La Jolla, Mission Beach or in front of the Hotel Del Coronado.

Birch Aquarium offers guided Grunion Runs in the Spring!

Get ready for a true Southern California experience! Observe hundreds of small silver fish called grunion ride the waves onto La Jolla beaches to spawn. Before hitting the beach, see grunion hatch before your eyes during a special presentation about this mysterious fish. Prepare for cool, wet conditions and bring a flashlight. Ages 6+ (minors must be accompanied by a paid adult.). Members $10, Public $12. RSVP Required: 858-534-7336

April 8: 10:45 p.m. – 12:45 a.m.
April 23: 10:30 p.m. – 12:30 a.m.
May 7: 10:30 p.m. – 12:30 a.m.
May 22: 10:30 p.m. – 12:30 a.m.
June 6: 10:30 p.m. – 12:30 a.m.

Photo courtesy of Birch Aquarium.

Learn more about Birch Aquarium here!