Sea Control Squadron 31 (VS-31) Topcats was a United States Navy anti-submarine warfare squadron, active during World War II, and later re-established in 1948, serving until 2008. It was founded as Scouting Squadron 31 in 1942, based at Naval Air Station Squantum, Massachusetts. It flew the dive bombers Douglas SBD-5 Dauntless, then the Curtiss SB2C-4E Helldiver in the North Atlantic until decommissioned at the end of the war in 1945.