The video shows a close-up of two fish in an aquarium. The fish are of different colors, one being red and the other being a mix of brown and gray. They are swimming around the tank, which is filled with rocks and other aquatic plants. The red fish is more active and is seen swimming around the tank, while the brown and gray fish is more stationary and is seen resting on the rocks. The water in the tank is clear, and the lighting is bright, highlighting the vibrant colors of the fish.