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Coral reefs are complex marine structures associated with communities of organisms, including reef-building corals. A reef is not simply one large animal or an underwater rock garden. Its visible form develops through the growth, accumulation, breakdown, and rearrangement of biological material. Many living things use the spaces within and around this structure, creating a community […]

Whales: Giants of the Ocean Whales are among the largest and most remarkable animals on Earth. These marine mammals live in oceans around the world, from warm tropical waters to the cold seas surrounding the poles. Life Beneath the Surface Although whales spend their lives in water, they breathe air through blowholes located on top