The MAR Proteus® is an experimental watercraft developed by Marine Advanced Research. The MAR Proteus is the first vessel of the wave adaptive modular vessel-type. The vessel was developed by Ugo Conti. Because of its use of four legs connecting the superstructure to the outriggers, the ship has earned the nickname of "The Spider Ship" or "Spider Boat". The unusual design attracted public attention during early trials, before it even had a registration number.