Marine Concepts is builder of the SeaPearl 21 and Tri-Sport. We will also rebuild, refurbish and upgrade your Sea Pearls. Contact us for Sea Pearl sails, parts and accessories. Marine Concepts is the birthplace of the Sea Pearl 21 and the Sea Pearl Trimaran! These boats are fast, fun, versatile, can be sailed in 8 inches of water or take an offshore swell. They can be beached, used for camping, and are really fast. Sea Pearls make excellent family/picnic/outing cruisers. They are dry, stable, commodious, and versatile. They can be rigged, and launched, by one person in 10 minutes, and launched from a beach! And did we mention that they are really fast?