The video showcases a Betta fish swimming in an aquarium. The fish is predominantly purple with some red and black coloring. The aquarium is filled with green plants and the fish is seen swimming around them. The Betta fish has long, flowing fins and a tail that it uses to navigate through the water. The plants in the aquarium are of different species, some with long, thin leaves and others with broader leaves. The water in the aquarium is clear, and the lighting is bright, highlighting the vibrant colors of the fish and plants.