Rough-Spined Urchin A rough-spined urchin (Chondrocidaris gigantea) beside the wreck of the naked Lady at 110′ Related Posts Diving the Naked Lady Postcard from the Reef - Urchin Crab Postcard from the Reef - Fine-Spined Urchin Share this:TweetWhatsAppEmail Author: Andrew An electrical engineer, amateur astronomer, and diver, living and working on the island of HawaiĘ»i. View all posts by Andrew