Shellusk Family

The Shellusk Family is a family of starfish-like creature in the Pikmin series. They usually serves as obstacles blocking Captain Olimar's way. The only currently known member of this family is the Starnacle.

Starnacle/Tripodidae asterias
The Starnacle is a member of the Shellusk family that uses iots three arms to block Olimar's path. However, one hit to its core will forces its arms to retract to the core for a short period of time.