Cancer

Cancer is the Zodiac Symbol for the dates of June 22 through July 22 of the "Tropical Calendar" (his Zodiac element is Water) and is part of the Constellation Droid series of Robot Masters. Much like the actual Zodiac Symbol upon which he is based, he has an aquatic nature and has a crab-like design about him. His weapon, the Bubble Beam, is capable of dealing devastating water-based damage to his opponents (especially if they are using electrical or fire-based attack or defensive schemes). However, he himself is weak against electrical-type weapons.

The Robot Masters that Dr. Wily sends to accompany him in his domain are Elec Man and Spark Man.

Trivia
The symbol in Cancer's abdomen is the zodiac symbol of Gemini.