USS Nymph, a 171-ton stern-wheel "tinclad" river gunboat, was built in 1863 at Cincinnati, Ohio, as the civilian steamer Cricket Number 3. Purchased by the Navy in March 1864, she was converted to a gunboat and commissioned in April. Nymph was thereafter part of the Mississippi Squadron and patrolled the great Western Rivers to supress Confederate activities during the final year of the Civil War. In June 1865, after the conflict's end, she was decommissioned. USS Nymph was sold in August 1865 and apparently reverted to her original name for civilian employment.