The video shows a close-up of a fish swimming in an aquarium. The fish is small and has a white body with black stripes. It is swimming near the bottom of the aquarium, which is covered in green plants. The water in the aquarium is clear, and the lighting is bright, highlighting the fish and the plants. The fish moves slowly and gracefully, and its fins and tail are visible as it swims. The plants sway gently in the water, adding a sense of calmness to the scene.