Arctiguana

Arctiguana is the Omnitrix's DNA sample of a Polar Manzardrill from X'Nelli

In the original series, Arctiguana's appearance somewhat resembles an iguana. He has three dorsal fins reaching down his back and gills on the sides of his head. He also had small spikes around his face.
 * -| Appearance=

Arctiguana wears white pants and a black open-front shirt with white cuffs. He wears the Omnitrix symbol on his left hand.

In Ultimate Alien, Arctiguana had three dorsal fins reaching down his back and gills on the sides of his head. He also had small spikes around his face. Arctiguana wore white pants and a black open-front shirt. He wore the Ultimatrix symbol on his chest.

In Omniverse, Arctiguana has clothing which covers most of his body. His chest is covered by a white shell. He has four pointed fins instead of three. The clothing goes all the way up to his head and his pants are fully black. The black stripes on his face do not go through his mouth anymore, instead going around his mouth. The spikes on his face are now on his chin. His gills are no longer visible. The Omnitrix symbol is on his chest. When 11-year old Ben was in 16-year old Ben's body, his voice was slightly higher.

11-year-old Arctiguana has sleeves with white cuffs and his leg is white and ending in black when it reaches his foot. His chest is not covered, so his gills are visible. His eyes are connected by the black stripe. The spikes are still on his face. The Omnitrix symbol is on his left wrist. Similar to Big Chill, Arctiguana is capable of firing a long-range freeze ray that isolates targets in ice on contact, cold enough to freeze molten lava. The ray can create an icy path that he can skate across in a snowboard-like fashion.
 * -| Powers=

Arctiguana can survive in any sub-freezing temperatures.

Arctiguana also has the ability to breath underwater.

As shown in For a Few Brains More, Arctiguana can use his breath as a means of quickly hovering himself (along with anyone holding on to him) across the ground. If Arctiguana uses his ice breath too much, he'll need to catch up his breath before using it to freeze things again.
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 * -| Theories=
 * Arctiguana was first theorized about in The Science of the Omnitrix when talking about his ultimate form.
 * -| Appearances=
 * The Science of the Omnitrix (debut)