The video shows a fish swimming in an aquarium. The aquarium is filled with green plants and rocks. The fish is swimming around the plants and rocks. The water is clear and the lighting is bright. The fish is small and appears to be a tropical species. The plants are lush and vibrant, and the rocks are of various sizes and shapes. The fish moves gracefully through the water, occasionally darting between the plants. The aquarium appears to be well-maintained and the fish is healthy-looking.