Answers (3)
On flat land as they live in tidal areas that get covered by water.
A mangrove is a shrub or small tree that grows in coastal saline or brackish water. The term is also used for tropical coastal vegetation consisting of such species. Mangroves occur worldwide in the tropics and subtropics, mainly between latitudes 25° N and 25° S.
Could you not have Googled this yourself?
"man·grove
noun
a tree or shrub that grows in chiefly tropical coastal swamps that are flooded at high tide. Mangroves typically have numerous tangled roots above ground and form dense thickets.
a tidal swamp that is dominated by mangroves and associated vegetation.
noun: mangrove swamp; plural noun: mangrove swamps"