HMS Sealark (or Sea Lark) was the American schooner Fly, launched in 1801 or 1811, that HMS Scylla captured in 1811. The Royal Navy took her into service as a 10-gun schooner. She participated in one notable single-ship action in 1812 that in 1847 the Admiralty recognized with a clasp to the Naval General Service Medal. She was sold in 1820.