In this video, we see a close-up of a fish tank. The tank is filled with water, and there are several fish swimming around. The fish are of different sizes and colors, and they are swimming in different directions. The water is clear, and we can see the gravel at the bottom of the tank. The fish are moving around, and we can see their fins and tails as they swim. The lighting in the tank is bright, and we can see the fish clearly. The tank appears to be well-maintained, and the fish seem healthy and active. Overall, the video provides a peaceful and calming view of the fish in their habitat.