Companion plants of mangrove forests include woody plants that occasionally appear in mangrove forests but do not become dominant species, as well as epiphytes, lianas, and herbaceous plants that appear under mangrove forests, such as sea knife bean, thick vine, and fish vine.

Mangrove forests are wetland woody plant communities growing in the intertidal zone of tropical and subtropical coasts, consisting of evergreen trees or shrubs dominated by mangrove plants.