Mangroves are a group of trees and shrubs that grow in the intertidal zone of tropical and subtropical coastlines. They are adapted to survive in saline water and are often found in estuaries, lagoons, and other coastal areas where the water is brackish.

Mangroves provide a number of important ecological functions. They help to protect coastlines from erosion, provide habitat for a variety of marine life, and help to filter pollutants from the water. Mangroves are also a source of food and medicine for many coastal communities.

Some of the most common species of mangroves include:

* Red mangrove (Rhizophora mangle): This is the most common mangrove species and is found throughout the tropics. Red mangroves have red-brown bark and long, arching roots that help to support the tree in the soft mud.

* Black mangrove (Avicennia germinans): Black mangroves are found in the tropics and subtropics of the Americas. They have dark brown or black bark and fleshy, succulent leaves.

* White mangrove (Laguncularia racemosa): White mangroves are found in the tropics and subtropics of the Americas. They have white or gray bark and small, oval leaves.

Mangroves are an important part of coastal ecosystems and play a vital role in protecting coastlines and providing habitat for marine life.