Underwater world: Mysteries and wonders of the ocean depths Coral Reefs: Vibrant and rich in biodiversity, coral reefs are the 'rainforests of the sea', serving as home to numerous species of marine life. Deep Sea Dwellers: At a depth of more than 1,000 meters live strange creatures such as deep sea squid, angler fish and black smoky springs. Large marine mammals: Whales, dolphins, manatees are huge inhabitants of the oceans, demonstrating complex forms of behavior and communication...