Photo and caption by Octavio Aburto
From the photographer: "Together with my friend David Castro, we were diving with a large group of Bigeye travellies at Cabo Pulmo National Park, Mexico. Thousands of fish forming a ball during the reproduction courtship. In the afternoon, these fish congregate to form a large spawning aggregation around the reefs of the National Park."
Location: Cabo Pulmo, Baja California Sur, Mexico