Introduction to marine life: The Great Barrier Reef is a tropical rainforest in the ocean. There are about 1,500 species of tropical marine fish living in the sea, including graceful swimming butterfly fish, beautiful and gorgeous lion fish, indolent sealhead fish, ridge fish, etc. Stonefish with spine-like protrusions that release venom... From July to September every year, endangered humpback whales also appear in the southern part of the coral island. In addition, there are more than 4,000 species of echinoderms, molluscs and other marine organisms living here, such as sea cucumbers, starfish, sea anemones, worms, sponges, sea slugs, etc., in a wide variety of colors.