Bigmouth Galaxy
From Lumapedia
Bigmouth Galaxy is the fourth Hungry Luma galaxy encountered in Super Mario Galaxy.
This galaxy is a single planet shaped like a giant fish. Captain Toad is stuck in a chest, which can only be broken by a gold shell.
List of Stars
Routing Info
Bigmouth Galaxy is accessible after completing Dusty Dune 1 and feeding 800 star bits to the Hungry Luma outside of the Bedroom.