Cutter took his new charge out of Pearl Harbor on 20 October for her second war patrol and his first as Commanding Officer. Heading for the East China Sea, he drew first blood on the 29th, 30th, and 31st, when "Seahorse" sank three trawlers with gunfire south of Japan." Subsequently, "Seahorse", working with , coincidentally assigned to the same area, attacked a large convoy detected by the day before. Surprised by the sudden evidence of "Trigger"s torpedoes, Cutter shot nine of his own and sank two freighters. Entering the East China Sea and bearing for the Korea Strait, Cutter sank two more ships, then returned to Pearl Harbor on 12 December. For this patrol, he claimed four ships (totalling 19,570 tons) sunk, not counting the trawlers. The patrol earned him his first Navy Cross.