The Bonefin Galaxy is a galaxy in Super Mario Galaxy. It is a large galaxy covered mostly by water. It is the only bonus galaxy where Mario fights a boss. In order to unlock this galaxy, Mario must collect at least 55 Power Stars and complete the Drip Drop Galaxy.
Kingfin's Fearsome Waters
Mario must defeat the boss of this galaxy, Kingfin, a skeletal fish that roams the hollow circular planetoid. Mario has to grab some of the Koopa Shells lying around the planet and use them to damage Kingfin. Once Kingfin is defeated, Mario can obtain the star.
- Bonefin's Boss music is a slight remix of the Bouldergeist's Battle Theme. The noticeable part that was changed is when you are close to Bonefin, a beat starts in the background. If you will swim away, the beat will fade to eventually disappear.
- The Bonefin Galaxy is the only bonus galaxy in Super Mario Galaxy in which Mario has to fight a boss.
- This galaxy features the exact same background as the Ghostly Galaxy and the Boo's Boneyard Galaxy.
- For unknown reasons, the Starshroom at the beginning of the level is empty, and no Toads are found in this galaxy, which is pretty creepy.