The video shows a group of fish swimming around in an aquarium. The aquarium is filled with rocks and other decorations, creating a natural habitat for the fish. The fish are of different sizes and colors, including blue, yellow, and black. They swim around the rocks and decorations, occasionally darting in and out of the crevices. The water is clear, and bubbles can be seen rising to the surface. The lighting in the aquarium highlights the vibrant colors of the fish and the textures of the rocks and decorations.