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What causes a bioluminescent display at the surface of the ocean?
Image: Andy Nosel
Every year, starting in June, thousands of leopard sharks gather off the coast of La Jolla near the Marine Room restaurant.
Why is this one spot so special? According to Scripps Institution of Oceanography, 97 percent of the sharks are pregnant females.
Resources:
KPBS, NPR: Increasing number of Leopard Sharks off La Jolla attracting snorkelers, scientists