Tarantox
Tarantox is one of the bosses in Super Mario Galaxy. It is found wrapped up in a web inside the Sticky Planet in the Space Junk Galaxy and can be reached via the front route in the Super Mario Galaxy demo.
Mario reaches it by using a Sling Pod to break the shell off of the Sticky Planet, revealing its web and the spider in a cocoon. Mario then must use another Sling Pod to tear the web and free the spider, then battle it.
Appearance
Tarantox resembles a Spider from Yoshi's Story. It has three wide oval eyes, wings, and a Snifit-like mouth. Its feet are similar to suction cups. It has horizontal stripes on its body and five glowing buttons on its back, one much larger than the others. It attacks Mario by flailing its legs around and spitting acid from its smaller buttons. It also has three large buttons on its underside, which Mario must pop.
Combat
To defeat the spider, Mario must use Sling Pods and throw himself at the largest glowing button to pop it. The spider will fall upside down, revealing three more red bumps on its underbelly. If Mario pops all of them, the spider will regain its feet and attack faster. If Mario repeats the procedure one more time, Tarantox will fall through its web and go flying into space, revealing a Power Star.