The term 'OYSTER HABITAT' can be summarized by the crossword solution of 'SEABED', which refers to the ocean floor where oysters live. Oysters are bivalve mollusks that inhabit shallow coastal waters, estuaries, and other areas with a high salinity level. They attach themselves to rocks, coral, and other hard surfaces on the seabed, where they feed on plankton and other organic matter. The seabed is an important habitat for oysters, providing them with the necessary nutrients and protection from predators.