A sea urchin.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). sea hedgehog. Retrieved September 25, 2026, from http://smartdefine.org/sea_hedgehog/definitions/2059362 |
| Chicago | Webster's. 2011. "sea hedgehog" http://smartdefine.org/sea_hedgehog/definitions/2059362 (accessed September 25, 2026). |
| Harvard | Webster's 2011, sea hedgehog, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/sea_hedgehog/definitions/2059362>. |
| MLA | Webster's. "sea hedgehog" 28 May 2011. Web. 25 September 2026. <http://smartdefine.org/sea_hedgehog/definitions/2059362> |