SSI Marine Ecology

You are cruising to your next dive site when the ocean suddenly begins to boil. The sky darkens with diving pelicans, and the water erupts with dolphins and sea lions. You’ve just stumbled upon a bait ball—the most spectacular and chaotic wildlife event in the Sea of Cortez. This guide explains the science behind this frantic defensive strategy, introduces the cast of predators that coordinate the attack, and reveals why the boat ride in San Carlos is often just as thrilling as the dive itself.