Doug Perrine / Eastern Spinner Dolphins (Stenella longirostris orientalis) swimming with schooling Yellowfin Tuna (Thunnus albacares). Off Baja California, Mexico.

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) hunting Northern Anchovy (Engraulis mordax), Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) hunting Northern Anchovy (Engraulis mordax), Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) hunting Northern Anchovy (Engraulis mordax), Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) school and Elegant Tern (Thalasseus elegans) flock feeding on Northern Anchovy (Engraulis mordax), Baja California, Mexico

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) school,vulnerable, Baja California, Mexico

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) school and Elegant Tern (Thalasseus elegans) flock feeding on Northern Anchovy (Engraulis mordax), Baja California, Mexico

Ingo Arndt / Pacific Bluefin Tuna (Thunnus orientalis) hunting Pacific Sardines (Sardinops sagax), California

Ralph Pace / Northern Anchovy (Engraulis mordax) school being driven to surface by Pacific Bluefin Tuna (Thunnus orientalis), San Diego, California

Ralph Pace / Pacific Bluefin Tuna (Thunnus orientalis) school, San Diego, California

Ralph Pace / Pacific Bluefin Tuna (Thunnus orientalis) biologist preparing satellite tags, San Diego, California

Ralph Pace / Pacific Bluefin Tuna (Thunnus orientalis) pair hunting Northern Anchovy (Engraulis mordax), San Diego, California

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) hooked by sport fisherman, Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific Bluefin Tuna (Thunnus orientalis) group feeding on Northern Anchovies (Engraulis mordax), San Clemente Island, California