The Great Barrier Reef is near the tropical north of Queensland, Australia. It is a seabed wonder made up of colorful corals and more than 10,000 unique marine species. We take a glass-bottom boat to enjoy the beautiful underwater world. The glass-bottom boat is very spacious inside. It is surrounded by glass. We can see the underwater world, go deep into the crystal-like underwater world and know the most beautiful part of Australia. The Great Barrier Reef is the largest coral reef group in the world and is said to have been included in the World Heritage Site. The Great Barrier Reef of Green Island, a scenic spot, stretches over 2,000 kilometers, inhabits more than 400 marine mollusks and more than 1,500 species of fish, many of which are endangered species in the world. In the colorful underwater world with a depth of four meters, you are surrounded by colorful tropical fish in the strange coral bushes. It's exciting to see all kinds of coral, dazzling tropical fish, large but gentle longevity fish, and calm sea turtles.