The video shows a group of fish swimming in a tank. The fish are of different sizes and colors, with some being darker and others lighter. They are swimming around the tank, occasionally coming close to the camera. The tank appears to be well-maintained, with clear water and a few rocks on the bottom. The fish are moving in different directions, some swimming towards the camera and others away from it. The lighting in the tank is bright, making it easy to see the fish and their movements.