How are marshes and mangrove swamps alike?

Here is a description from the EPA's site at http://www.epa.gov/owow/wetlands/types/mangrove.html: Description Mangrove swamps are coastal wetlands found in tropical and subtropical regions....

they are both coastal wetland and are both in marshes

There is no future

According to the Florida Department of Environmental Protection, Magrove Swamps are wetlands with tropical evergreen trees and shrubs, especially mangroves which come in red, black or white.

marshy swampy biome