In the video, there is a large fish swimming in a tank with a smaller orange fish. The large fish has a long body and a pointed nose, while the smaller fish has a rounder body and a shorter nose. The tank is filled with green plants and rocks, creating a natural habitat for the fish. The large fish is seen swimming around the tank, occasionally coming close to the smaller fish, which seems to be following the larger fish. The water in the tank is clear, and bubbles can be seen rising to the surface.