Abstract: An adjustable and transformable fixture support apparatus for mountably supporting a fixture such as a boat seat, the support system including a swivel, a pedestal and a support anchor, the swivel having one end formed to permit mounting the fixture thereto and an opposing end forming a stem, the pedestal having one end forming a stem and an opposing end formed to receive the stem of the swivel so as to releasably retain the swivel against longitudinal displacement while adjustably retaining the swivel in a plurality of radial orientations, and the support anchor being formed to receive the stem of the swivel and alternatively the stem of the pedestal so as to releasably retain the respective stem against longitudinal displacement while adjustably retaining the respective stem in a plurality of radial orientations.