MAY 4-7TH, 1864: Steamers USS Sunflower and Honduras and sailing bark J.L. Davis supported the capture of Tampa, Florida, in a combined operation with the Army. They carried the troops there and provided a naval landing party. Acting Master Edward Van Sice of the Sunflower reported: "At 7 A.M., the place was taken possession of, capturing some 40 prisoners, the naval force capturing about half, which were turned over to the Army, and a few minutes after 7 the Stars and Stripes were hoisted in the town by the Navy."
They also captured the blockade running sloop Neptune on May 6th with a cargo of cotton.
It wasn't a major port, but shows the ability of the Union to strike anywhere at any time along the Confederacy's coast.