The bottom of an ocean, lake or pond, where little or no sunlight reaches. Benthic zone. The benthic zone is the dark area at the bottom of a body of water where plants can't photosynthesize due to lack of sunlight.
A water having more salinity than freshwater, but not as much as seawater. Brackish. Brackish water is a mix of freshwater and saltwater, often found where rivers meet the sea.
A shrubs or small trees that grows in coastal saline or brackish water. Mangroves. Mangroves are unique trees that thrive in salty coastal environments and help protect shorelines from erosion.