In the video, a scuba diver is seen underwater holding a book. The diver is wearing a black wetsuit with yellow accents and a yellow oxygen tank. The water is clear, and the ocean floor is visible in the background. The diver is holding a book with a colorful cover and appears to be looking at it closely. Another person's hand is seen holding a small fish in front of the diver. The fish is white with black stripes and appears to be alive. The diver seems to be examining the fish closely, possibly identifying it from the book.