The video shows a cartoon puffer fish with a large mouth and sharp spikes. The fish is white with a brown eye and a black pupil. It is swimming in the water with two small fish, one blue and one green, who are also swimming around it. The background is a deep blue color, indicating that the scene is underwater. The puffer fish opens its mouth wide, and the two smaller fish swim inside. The puffer fish then closes its mouth, trapping the two smaller fish inside. The video ends with the puffer fish swimming away with the two smaller fish trapped inside its mouth.