12/06/2026
Creature Feature | Western Slate Pencil Sea Urchin ✏️
This sea urchin got its name because of its large, stout spines, which were once collected and used as pencils on slateboards!
Did you know...
✏️ Sea urchins have a round jaw lined with five spiky teeth that scrape down rocks to remove encrusting animals and plants.
✏️Their unique jaw and tooth structure is known as 'Aristotle’s lantern', named after the famous Greek scientist and philosopher.
✏️ Aristotle described the jaw structure of sea urchins as appearing ‘like a lantern’ over 2,000 years ago.
✏️ Like starfish, sea urchins are covered in hundreds of tube feet, through which water flows to allow them to taste, move and breathe!
✏️ Their flexible spines can be folded down so they can crawl into small crevices.
✏️ When they find a secure hiding place, the spines pop back up and smaller ‘spinlets’ fold in to hold them in place.
Discover what they feel like at AQWA's Touch Pool!