The Starnacle (タコヒトデ?, lit.: "Octopus Starfish") is a rare octopus-like enemy in Hey! Pikmin. It has three pink equally spaced tentacle-like arms, and a large green eye in its center. Its eye closes and its arms retract when the eye is hit with a Pikmin. It is found frequently in the waters of Pollution Pool, where its arms act as an obstacle to the player and their Blue Pikmin.
The Starnacle's only purpose is to block underwater passages. Aside from that, it doesn't do anything, and is harmless. When a Pikmin is thrown at its eye, it will retract its tentacles, leaving enough room for Olimar and his Pikmin to avoid the creature and keep going in the passage.
There is no way to defeat this enemy; however, it can be stunned for a certain amount of time by simply throwing a Blue Pikmin right into its eye.
Hey! Pikmin logs
“This mollusk-like creature's arms are long like an octopus's but tough like a starfish's. They withdraw when struck. The S.S. Dolphin II says he gets anxious at the sight of it, but I know better: those thin, gossamer arms are a real delicacy when properly prepared.”
The name Starnacle is derived from "star" and "tentacle". Its Japanese name, タコヒトデ?, simply translates to "Octopus starfish", referring to two aquatic creatures with long arms.
Names in other languages