Urchin

Urchins are enemies found in Super Mario Galaxy 2. They resemble sea urchins and have two eyes. Aquatic Urchins are purple while Land Urchins are Red. When you get too close to an Urchin it will retract its spikes and roll towards you. Aquatic Urchins are not as dangerous as Land Urchins because they cannot float in water and are restricted to rolling around on the ocean floor.

Defeating Urchins
It is impossible to defeat urchins without the aid of power ups. To defeat Purple Urchins, throw a green shell at them. Use Fire Mario's fireballs to defeat Red Urchins. All Urchins have the ability to move so aim carefully. All Urchins release a large amount of star bits when defeated.