what is the name given to a curved of hooked area of land that extends into a sea of ocean

http://www.google.com/search?q=prosecutors+cannot+be+subject+to+civil+suits&rlz=1C1AVSX_enUS414US423&oq=prosecutors+cannot+be+subject+to+civil+suits&aqs=chrome..69i57.602j0&sourceid=chrome&espvd=210&es_sm=122&ie=UTF-8#es_sm=122&q=cape+geography+definition

http://www.lonelyplanet.com/maps/north-america/usa/cape-cod/map_of_cape-cod.jpg