During the winter months, blue whales congregate in the Costa Rica Dome, an area of the Pacific Ocean 500 to 800 miles (800 to 1,300 kilometers) west of Costa Rica, though its exact location changes every year. Scientists have discovered that the dome serves as a key location for feeding, breeding, and calving.

Photograph by Flip Nicklin, from National Geographic’s Costa Rica Photos


Stay up to date with the latest stories by signing up to our newsletter, or following us on Facebook.