A Green Sea Urchin attached to the viewing window of a tide tank. Tube feet are attached to the window and the central Aristotle lantern opening is visible.

The #AtlanticOcean #GreenSeaUrchin is light green with pink to purple tentacles and spines. Sea urchins use tube feet to move along the ocean floor eating algae. The #AristotleLlantern, is five-sided mouthlike opening. Green Urchin spines can still cause distress if the skin is punctured.