Gax

Gax is a Chimera Sui Generis, a race of cephalopodic humanoids who are able to turn into giant squid-like creatures when exposed to water. Gax is essentially a clone of his DNA's donor Vilgax, but in black armor that has a white stripe on the chest. He has spikes on his knees and shoulder pads and has six tentacles dangling in the front of his face. His tentacles fades into orange and wears black wristbands. The Omnitrix symbol is on his chest. Gax first appeared in the "Omni-Tricked" four-parter, though Ben lost use of the form after an aged Vilgax retrieved his DNA sample to restore himself to his prime.