In the video, a dolphin is seen swimming in the ocean. The dolphin is a large, gray mammal with a smooth, streamlined body. It has a dorsal fin on its back and a long, snout-like beak. The dolphin is swimming gracefully, moving its flippers in a rhythmic motion. The water around the dolphin is clear and blue, and the sunlight is reflecting off the surface of the water, creating a shimmering effect. The dolphin appears to be alone in the water, and there are no other visible creatures or objects in the vicinity.