In the video, a person is seen holding a large green leaf over a fish tank. The leaf has a large bite taken out of it. The person then drops the leaf into the water, and the fish in the tank begin to eat the leaf. The fish are of various sizes and colors, and they swim around the tank, nibbling on the leaf. The water in the tank is clear, and the tank is well-lit, allowing for a good view of the fish and the leaf.