Urchin
50 species you can see diving.
- Big White Heart Urchin Brissus unicolor
- Black Banded Sea Urchin Echinothrix calamaris
- Black Sea Urchin Arbacia lixula
- Black Sea Urchin Centrostephanus rodgersii
- Blue-Black Sea Urchin Echinothrix diadema
- Blue-Spotted Sea Urchin Astropyga radiata
- Chilean Sea Urchin Loxechinus albus
- Crowned Sea Urchin Centrostephanus coronatus
- European Edible Sea Urchin Echinus esculentus
- Fined Spined Urchin Lissodiadema purpureum
- Fire Urchin Asthenosoma varium
- Flower Urchin Toxopneustes pileolus
- Giant Heart Urchin Plagiobrissus grandis
- Globular Sea Urchin Mespilia globulus
- Green Sea Urchin Psammechinus miliaris
- Green Sea Urchin Lytechinus variegatus
- Green Urchin Echinocyamus pusillus
- Heart Urchin Brissopsis lyrifera
- Heart Urchin Moira atropos
- Heart Urchin Metalia spatagus
- Heart Urchin Metalia dicrana
- Heart Urchin Maretia planulata
- Keeled Heart Urchin Brissus latecarinatus
- Lance Urchin Phyllacanthus imperialis
- Lance Urchin Prionocidaris baculosa
- Little Burrowing Urchin Echinoneus cyclostomus
- Little Pink Urchin Pseudechinus magellanicus
- Long-Spined Sea Urchin Diadema antillarum
- Long-Spined Sea Urchin Diadema africanum
- Northern Sea Urchin Strongylocentrotus droebachiensis
- Porcupine Sea Urchin Diadema setosum
- Purple Pacific Sea Urchin Echinometra vanbrunti
- Purple Sea Urchin Heliocidaris crassispina
- Purple-Spined Sea Urchin Arbacia punctulata
- Red Heart Urchin Meoma ventricosa
- Red Pencil Urchin Heterocentrotus mamillatus
- Red Rock Urchin Echinometra lucunter
- Red Sea Urchin Mesocentrotus franciscanus
- Reef Urchin Echinometra viridis
- Rock-Boring Urchin Echinometra mathaei
- Savigny's Long-Spine Sea Urchin Diadema savignyi
- Six Holed Keyhole Urchin Leodia sexiesperforata
- Slate Pencil Urchin Eucidaris tribuloides
- Slate Pencil Urchin Eucidaris thouarsii
- Stained Collector Urchin Pseudoboletia maculata
- Striped Sea Urchin Tripneustes gratilla
- Striped Spine Sea Urchin Temnopleurus toreumaticus
- Ten-Lined Urchin Eucidaris metularia
- Thomas' Sea Urchin Prionocidaris thomasi
- Violet Sea Urchin Sphaerechinus granularis