The video shows a close-up of a clownfish swimming in and out of the tentacles of a sea anemone. The clownfish is orange with white stripes, and the sea anemone has long, thin tentacles that are a light brown color. The clownfish appears to be searching for food or hiding from predators, and the sea anemone seems to be providing protection for the fish. The video captures the symbiotic relationship between the two species, with the clownfish benefiting from the anemone's protection and the anemone receiving food in return.