In the video, a fish is seen swimming in an aquarium. The aquarium is filled with green plants and a piece of wood. The fish is black and white with a yellow tail and is swimming around the plants and wood. The water is clear and the lighting is bright, highlighting the colors of the fish and the plants. The fish appears to be healthy and active, moving around the tank with ease. The plants sway gently in the water, adding to the serene atmosphere of the aquarium. Overall, the video captures the beauty and tranquility of an aquarium environment.