Description: A reef is an underwater structure formed from the accumulation of marine organisms, such as corals, or sediments like sand and rocks. It is found just above or below the ocean surface and can vary in size and shape. Reefs are vital ecosystems that host a great biodiversity, serving as habitats for numerous species of fish, invertebrates, and marine plants. Their structure can be irregular, with ridges and cavities that provide shelter and breeding grounds for marine life. Additionally, reefs act as natural barriers that protect coastlines from erosion and waves, contributing to the stability of the marine environment. Their beauty and diversity make them popular destinations for diving and snorkeling, attracting tourists from around the world. However, reefs face significant threats, such as climate change, pollution, and overfishing, which jeopardize their existence and the health of the ecosystems that depend on them.
