USFC Fish Hawk was a fisheries science research ship operated by the United States Commission of Fish and Fisheries, commonly called the United States Fish Commission, from 1880 to 1903 and as USFS Fish Hawk by its successor, the United States Bureau of Fisheries, from 1903 1918 and from 1919 to 1926. She was the first large ship purpose-built by any country for the promotion of fisheries, and spent her 46-year career operating along the United States East Coast, in the Gulf of Mexico, and off Puerto Rico.