The one invincible enemy in Spongebob Squarepants Rehydrated

At the start of the Kelp Forest level (The worst level) in Spongebob Rehydrated you'll come across a very unsuspecting enemy, you might not even notice it like we didn't. HOWEVER this strange plant that only appears once in the whole game is impervious to all of your attacks and will give you the hardiest open-palm slap you've likely ever felt.