A massive school of Northern Anchovy formed a dark band off La Jolla on July 8, 2014. Scripps scientists, who haven't seen such an aggregation in more than 30 years, said it is unclear why the unusually large school moved into shallow waters off the coast. Members of the Scripps Marine Vertebrate Collection have collected samples for study.
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Related Image Gallery: Massive School of Anchovies Migrates off La Jolla
Related Video: BONUS anchovy footage
Stifled ocean activity the dominant force behind historic event