The video shows a group of fish swimming in a tank. The fish are dark in color and are swimming around the tank. The water is clear and there are no other objects or creatures visible in the tank. The fish are moving in different directions, some swimming towards the camera and others away from it. The tank appears to be indoors, and there is no visible light source. The fish seem to be of the same species, and there are no visible markings or distinguishing features. The tank is not very large, and the fish are the only visible living creatures in the video.