Grunion Run programs feature a rare opportunity to witness grunion eggs hatch before your eyes.
Join Birch Aquarium at Scripps Institution of Oceanography, UC San Diego, for a must-see ocean adventure. From March 28 until early June, observe the mysterious grunion spawn on the beaches of La Jolla.
On certain spring nights following high tides, hundreds of the small, silvery fish ride the waves onto shore for this remarkable mating ritual. While on the beach, female grunion bury themselves in the sand to lay eggs, while males wrap themselves protectively around the females to fertilize their eggs. Both catch a wave to return to sea.
Birch Aquarium at Scripps naturalists will guide participants through an unforgettable night, starting with a presentation on grunion, followed by a rare opportunity to witness grunion eggs hatch before their eyes. The unique experience continues with a moonlight beach exploration. Please bring a flashlight and warm jacket. The program is $12 per person.
•Saturday, March 28, 10:30 p.m.-12:30 a.m.*
* Includes a special presentation by Karen Martin, Pepperdine University marine biologist and grunion expert
•Friday, April 10, 9:30-11:30 p.m.
•Saturday, April 11, 10 p.m.-12 a.m.
•Saturday, May 9, 9-11 p.m.
•Monday, May 25, 9:30-11:30 p.m.
•Monday, June 8, 9:30 p.m.-11:30 p.m.
NOTE: Grunion Runs do not take place at Birch Aquarium at Scripps. Reservations must be received in advance by calling 858-534-7336.
Saturdays and Sundays
April 4-June 13
11:30 a.m., 12:30 p.m. & 1:30 p.m.
Included with aquarium admission
Join Birch Aquarium at Scripps naturalists every Saturday and Sunday as they share the amazing tale of the elusive California grunion. Learn how these unique fish "run" up our local beaches and lay their eggs in the moist sand. Experience the joy of watching baby grunion hatch right before your eyes!
About Birch Aquarium at Scripps
Birch Aquarium at Scripps is the public exploration center for the world-renowned Scripps Institution of Oceanography at UC San Diego. Perched on a bluff overlooking the Pacific Ocean, the aquarium features more than 60 habitats of fish and invertebrates from the cold waters of the Pacific Northwest to the tropical waters of Mexico and the Caribbean. An interactive museum showcases research discoveries by Scripps scientists on climate, Earth and ocean science. Accredited by the Association of Zoos and Aquariums, Birch Aquarium has an annual attendance of more than 400,000, including 45,000 school children.
Visit Birch Aquarium at Scripps
2300 Expedition Way, La Jolla, Calif.
9 a.m.-5 p.m. daily
$11 Adult, 18+
$9 Senior, 60+
$7.50 Youth, 3-17
Free Children, 2 and under
Free Scripps Oceanographic Society Members
From Interstate 5, exit at La Jolla Village Drive.
West one mile. Left on Expedition Way.
Birch Aquarium offers three-hour courtesy parking.
Scripps Institution of Oceanography at the University of California San Diego, is one of the oldest, largest, and most important centers for global science research and education in the world. Now in its second century of discovery, the scientific scope of the institution has grown to include biological, physical, chemical, geological, geophysical, and atmospheric studies of the earth as a system. Hundreds of research programs covering a wide range of scientific areas are under way today on every continent and in every ocean. The institution has a staff of more than 1,400 and annual expenditures of approximately $195 million from federal, state, and private sources. Scripps operates oceanographic research vessels recognized worldwide for their outstanding capabilities. Equipped with innovative instruments for ocean exploration, these ships constitute mobile laboratories and observatories that serve students and researchers from institutions throughout the world. Birch Aquarium at Scripps serves as the interpretive center of the institution and showcases Scripps research and a diverse array of marine life through exhibits and programming for more than 430,000 visitors each year. Learn more at scripps.ucsd.edu and follow us at Facebook, Twitter, and Instagram.
About UC San Diego
At the University of California San Diego, we constantly push boundaries and challenge expectations. Established in 1960, UC San Diego has been shaped by exceptional scholars who aren’t afraid to take risks and redefine conventional wisdom. Today, as one of the top 15 research universities in the world, we are driving innovation and change to advance society, propel economic growth, and make our world a better place. Learn more at www.ucsd.edu.