The Mantaris-class medium transport was developed for use in colonizing Naboo's primary moon while fostering further union between the Naboo and the Gungans. As such, its design not only reflects the artistic sensibilities of both species, but it is equally capable of functioning under water, in planetary atmospheres, and the frigid depths of space.

The basic design is Gungan, based upon their well-tested submersible cargo vessel. Naboo engineers made the design spaceworthy and improved upon the modularity of the Bongo-class submersible to outfit the Mantaris-class transport with bubble-shaped, modular sections. These sections could either increase the vessel's cargo capacity by 100 metric tons, add 30 people to its passenger capacity, or carry wildlife ranging from colo claw fish to nuna birds in appropriately outfitted zoological modules. The Mantaris can carry up to four pods at a time.

Craft: Theed Palace Space Vessel Engineering Corps/Otoh Gunga Bongowerks Mantaris Amphibious Medium Transport. Class: Medium Transport. Cost: 280,000 credits. Size: Medium (68 m long, plus 30 m long heat sink finials). Crew: Normal +2 (1 pilot, 1 navigator/shield operator, 1 communications/security officer, 1 engineer/gunner, 1 astromech droid). Passengers: 20, plus additional depending on attached modules. For live animals, a module pod can carry 60 small creatures, 30 medium creatures, 15 large creatures, 7 huge creatures, 3 gargantuan creatures, or 1 colossal creature. Cargo Capacity: 250 metric tons, plus additional depending on attached modules. Consumables: 3 months, plus additional depending on attached modules. Hyperdrive: x2 (backup x8). Maximum Speed: Ramming. Defense: 20 (+10 armor). Shield Points: 30. Hull Points: 120. DR: 10. 
Weapons: Concussion missile launchers (6 missiles each). Fire Arc: 1 front, 1 back. Attack Bonus: +4 (+2 crew, +2 fire control). Damage: 7d10x2. Range Modifier: PB +0, S/M/L na.