The Amphibian is a unit exclusive to the Aquarion tribe. However, they can be mind-bent to another tribe using Mind Benders and still have the same characteristics as an Amphibian but with a different color scheme. They are the Aquarion version of the Rider. They have 2 movement when in water but 1 movement on land. This also applies when escaping.
Like other Aquarion amphibious units (Tridention and Crab), it can swim in shallow water automatically, but needs the Free Diving or Navigation technology to be able to enter ocean.