Developed in the early AC 190s, OZ's first amphibious mobile suit was the OZ-08MMS Cancer. The Cancer, despite its lack of legs, could operate underwater, changing into a submarine-like form for speed and maneuverability. Using hydrojet engines in its main body for propulsion, its maneuvering was handled by a ring of reversible side-spinning propeller blades on each arm. The general shape of the Cancer resembled its namesake, with "cancer" being the fourth Zodiac sign meaning "crab".

With no legs or manipulator hands, the Cancer barely qualifies as a mobile suit. The arms also each mounted a large pincer-like claw, which could be used to grapple targets, and each claw contained a pair of torpedo launchers, giving the Cancer the ability to deliver a nasty blow to anything it grabbed. Also, in emergencies the Cancer can grasp its target with its claws and launch its torpedoes at point-blank range.

Source: Gundamproject.com, New Mobile Report Gundam Wing