Reefs
A reef is a ridge or ridge-like formation of rock, sand, or living organisms that rises from the ocean floor to shallow depths, often creating hazards for ships or vibrant ecosystems. The term has several distinct meanings.
Meanings
- Reefs (coral) — underwater structures built by corals and other organisms, among Earth's most biodiverse habitats
- Reefs (geological) — ridges of rock or sand formed by erosion, deposition, or tectonic processes
- Reefs (nautical) — underwater hazards to navigation, historically marked on charts and in sailor lore
Related
Marine ecology, Ocean currents, Biodiversity, Geological time scale, Tides