Marine features refer to the various physical characteristics found in oceanic and coastal environments. These include structures like coral reefs, sea mounts, and ocean trenches, which play crucial roles in marine ecosystems. Coral reefs, for example, provide habitat for diverse marine life, while sea mounts can influence ocean currents and biodiversity. Additionally, marine features encompass coastal formations such as beaches, estuaries, and mangroves. Beaches are areas where land meets the ocean, often shaped by wave action. Estuaries are regions where freshwater from rivers meets saltwater from the sea, creating unique habitats. Mangroves are coastal trees that thrive in salty conditions, offering protection for various species.