INSHORE MARINE HABITATS (Estuaries, broadly defined) Fauna: Benthic (bottom) organisms determine to a considerable degree the community that lives in overlying water column; many fish and invertebrate species spend all or part of their life cycle in these habitats; shrimps, blue crabs, and spotted seatrout are examples of especially important recreational and commercial species; oysters are concentrated in inshore areas along the Gulf coast, particularly the Apalachicola estuary.