USS Hawkbill (SSN-666), a Sturgeon-class submarine, was the second ship of the United States Navy to be named for the hawksbill, a large sea turtle. (The name perpetuated the inadvertent misspelling in the naming of Hawkbill (SS-366).)
Hawkbill was the last of the short-hull Sturgeons to be decommissioned. She entered the Navy’s Nuclear Powered Ship and Submarine Recycling Program on 1 October 1999. She was stricken from the Naval Vessel Register on 15 March 2000 and ceased to exist on 1 December 2000. Her sail is exhibited in the Idaho Science Center in Arco, Idaho.