Long Island Sound

Long Island Sound is shown highlighted in pink between Connecticut (to the north) and Long Island (to the south)

The Long Island Sound is an estuary of the Atlantic Ocean. It is in the United States. The US states of Connecticut (to the north) and Long Island, New York (to the south) share it. The Connecticut River at Old Saybrook, Connecticut connects to the sound. To the west, The Bronx and Westchester County, New York connect to the East River. To the east, the Block Island Sound connects to the sound.

Long Island Sound Media

Long Island Sound at night as seen from space
Diamondback terrapins (Malaclemys terrapin) are the only aquatic turtles to reside in brackish water, which makes the Long Island Sound estuary a special habitat for the Northern subspecies.
Osprey (Pandion haliaetus) sitting on a tree swallow's nest box in the marsh at Hammonasset Beach State Park, Madison, CT. Ospreys are frequent summer residents of areas like Long Island Sound and other coastal areas in North America.
Long Island Sound in Branford, Connecticut
Long Island Sound from Calf Pasture Beach in Norwalk, Connecticut