Male Orca AD37, "Brit" taking a Dive

Male orca (Orcinus orca) AD37 "Brit" of pod AD8, swims next to a scientific research skiff in Amalik Bay. Orca populations have declined significantly since the Exxon Valdez oil spill in 1989. By collecting photos of saddle patches and dorsal fin notches, scientists are able to identify unique individual whales. Photo IDs provide vital information on the exact ages of individuals, calving rates, survival rates, and the overall health of the population.