1888United States Fish Hatchery started on Ten Pound Island.Economy and Industry, Maritime & Fishing Industry
The federal government responded to declining codfish stocks by opening a fish hatchery on Ten Pound Island in Gloucester Harbor in 1889. Operated by the U.S. Fish Commission, the hatchery was originally intended to be experimental but its release of millions of codfish eggs and hatchlings began to achieve a rebound in the inshore stock of cod in the 1880s that had not been caught in Gloucester Harbor for decades.
“Ten Pound Island Light, Featured in Maritime History of Massachusetts--A National Register of Historic Places Travel Itinerary.” https://www.nps.gov/nr/travel/maritime/ten.htm.