In the video, a person is seen interacting with a puffer fish inside a tank. The puffer fish has a white body with black spots and a yellow eye. The person's hand is visible as they gently touch the fish, causing it to puff up. The fish's spines are clearly visible, and it appears to be healthy and active. The tank is filled with water, and there are no other fish visible in the video. The person's hand is careful not to touch the fish's spines, and the fish seems to be comfortable with the interaction.