The video shows a group of fish swimming in an aquarium. The fish are of different sizes and colors, including red, orange, and black. The aquarium is decorated with green plants and brown driftwood, creating a natural habitat for the fish. The water is clear, and the lighting is bright, highlighting the vibrant colors of the fish and the plants. The fish are seen swimming around the tank, occasionally darting in and out of the plants. The video captures the serene movement of the fish and the peaceful ambiance of the aquarium.