Bonefin Galaxy

The Bonefin Galaxy is a galaxy in Super Mario Galaxy. This galaxy, like the Drip Drop Galaxy, is basically a large body of water with a solid core. Unlike the Drip Drop Galaxy, this galaxy has a large, spiky, shell shielding most of it. This galaxy is the home of Kingfin, who Mario must defeat to earn a Power Star.

Kingfin Planet
This is a very large planet with a very large body of water. The planet is surrouned by a spiky shell. Kingfin and his followers live here. There is a 1-up mushroom inside a glowing green treasure chest.

Kingfin's Fearsome Waters
In the first and only level Mario must defeat Kingfin by attacking with Koopa Shells. After Kingfin takes 1 hit, Kingfin will start releasing robotic fish that will home in on Mario's position. Once Kingfin has been hit 5 times, it will crumble, die, and release a Power Star.

How to unlock
To unlock this Galaxy, the player must have at least 55 stars and have the Drip Drop Galaxy completed.