The video shows a close-up of a fish swimming in an aquarium. The fish is small and has a shiny, silver body with a black stripe running down its side. It is swimming among green plants that are growing in the water. The plants have long, thin leaves that sway gently in the water current. The background of the aquarium is a bright blue color, creating a contrast with the green plants and the silver fish. The fish moves smoothly and gracefully through the water, occasionally darting between the plants.