In the video, a person is seen petting a fish in an aquarium. The fish is brown and has a large mouth. The person's hand is visible in the frame, and they are petting the fish gently. The aquarium is filled with water, and there are other fish swimming around in the background. The lighting in the aquarium is bright, and the water is clear. The person's hand is moving slowly, and the fish seems to be enjoying the attention. The person's hand is the only part of them that is visible in the video.