In the video, a manatee is swimming in the water while a person wearing a snorkel mask is swimming next to it. The manatee is large and has a grayish-brown color. The person is wearing a blue wetsuit and a yellow snorkel mask. The water is clear and blue, and the bottom of the water body is visible. The manatee is moving slowly and gracefully, while the person is swimming alongside it, observing it.