The video shows a large blue fish swimming in an aquarium. The fish has a blue body with a lighter blue underbelly and a dark blue stripe running down the side of its body. It has a large mouth and a pointed snout. The aquarium is decorated with green plants and yellow flowers, providing a colorful backdrop for the fish. The fish moves gracefully through the water, occasionally turning its body to show its fins and tail. The lighting in the aquarium highlights the fish's scales and the vibrant colors of the plants.