Avicennia marina, commonly known as the grey mangrove, is a species of mangrove tree found in coastal intertidal zones. It thrives in saline environments and is characterized by its distinctive prop roots, which help stabilize the tree in soft, muddy substrates. This species plays a crucial role in coastal ecosystems by providing habitat for various marine and terrestrial species. The grey mangrove is notable for its ability to filter salt from seawater, allowing it to survive in harsh conditions. It produces small, white flowers and can grow up to 10 meters tall. Avicennia marina is also important for coastal protection, reducing erosion and serving as a buffer against storm surges.