Place where freshwater meets saltwater.  It is partially encolsed with one or more rivers flowing into it and is a connection to the open sea. 

Estuaries are often called

When large plants like mangroves and marsh grasses die and are broken down by bacteria and fungi, they become ______________

Bathyal zone is the area where planktons can thrive,

Marshes are areas where freshwater meets saltwater

Areas reached by sunlight have low dissolve oxygen

Intertidal zones contain volcanoes and deep trenches.

Nektons are organisms that drift freely in bodies of water

Producers cannot grow in benthic zone since oxygen is low

Cattails are submerged plants that have stems rising to the surface

Wetlands have moist and humid conditions where mangroves are found

Photosynthetic aquatic animals thrive in areas with deep, dark conditions

Aquatic plants in fast-moving rivers have flexible stems to resist the water current