The video shows a close-up of a tank filled with water and several small fish. The fish are swimming around in the water, and the camera pans around to show them from different angles. The fish are dark in color, and the water is clear, allowing for a good view of the fish. The tank appears to be indoors, and there is no visible plant life or decorations in the tank. The fish are of various sizes, but all are small and appear to be young. The lighting in the room is bright, and there are no other objects or people visible in the video.