Through June 1973, "Spadefish" operated out of Norfolk along the United States East Coast. The genus "Chaetodipterus" belongs to the family Ephippidae, which includes spadefish and batfish. "Spadefish" caught "Shinyo" with four torpedoes and sent her under with 1,130 sailors killed. "Spadefish" (SS-411) received four battle stars for World War II service. Other portions of the scattered convoy were attacked by "Redfish" and "Spadefish". Atlantic spadefish are not of much commercial value. The Pacific spadefish ("Chaetodipterus zonatus") is a species of fish of the family Ephippidae. On 27 January, "Pompon" reported a convoy contact and, together with "Spadefish", attacked. "Spadefish" did not rest on her laurels. Spadefish are generally considered to be an overfished group. Since "Pompon" and "Jallao" were delayed she sailed in company with "Spadefish", , and . "Spadefish" added to her score on 4 February by sinking the passenger-cargo ship "Tairai Maru". "Spadefish" was preparing for another war patrol when hostilities with Japan ended. Atlantic spadefish feed on small, benthic invertebrates including crustaceans, mollusks, annelids, and cnidarians. "Spadefish" completed overhaul in July 1974 and resumed operations along the U.S. East Coast.