Sea Urchins, Part 2
34 entries in the Sea Urchins, Part 2 compendium.
Evechinus chloroticusEndemic New Zealand sea urchin, overabundant due to overfishing and climate change.Paracentrotus lividusA purple-spined sea urchin of the Mediterranean and eastern Atlantic.Psammechinus miliarisA shallow-water sea urchin with depth-dependent coloration.Red sea urchinA keystone grazer and ecosystem engineer of temperate rocky reefs.Strongylocentrotus droebachiensisA green sea urchin found in northern oceans worldwide.Strongylocentrotus purpuratusFirst echinoderm genome sequenced; key kelp forest species.HolasteroidaAn order of irregular sea urchins with marked bilateral symmetry.ClypeasteroidaFlat, burrowing sea urchins with a coin-like test.Echinarachnius parmaA Northern Hemisphere sand dollar with a purplish brown test.Echinocyamus pusillusA small sand dollar that buries in gravel and turns green when injured.Mellita quinquiesperforataA tropical sand dollar with nocturnal feeding and righting behavior.SpatangoidaHeart urchins are bilaterally symmetrical sea urchins with a distinct heart shape.Echinocardium cordatumA heart-shaped urchin that buries in sand worldwide.Meoma ventricosaA large Caribbean urchin with dual symmetry and burrowing habits.GlyptocidaridaeA monotypic sea urchin family with a single living species.StomopneustesThe sole living species in its family Stomopneustidae.EucidarisSlate pencil urchins with stout, beaded spines and wide distribution.GoniocidarisA genus of sea urchins typical of the subfamily Goniocidarinae.Aspidodiadema jacobyiA deep-sea urchin studied for its unusual reproductive biology.CidaridaeBasal sea urchin family with stout tests and massive spines.Cidaris blakeiA deep-sea urchin with distinctive fan-like spines.Goniocidaris umbraculumA brooding sea urchin from southern New Zealand waters.Prionocidaris thomasiA fuzzy-spined urchin with maroon secondary spines from the Pacific.Aporocidaris incertaDeep-sea Antarctic urchin with a compressed test and dark brown color.DiadematidaeSea urchins with eyes and long, hollow spines.Astropyga radiataA large, venomous Indo-Pacific urchin with blue-spotted bare areas.Centrostephanus coronatusA nocturnal, carnivorous sea urchin with long, sharp spines.Centrostephanus longispinusA sea urchin with long, toxic spines and two Atlantic subspecies.Echinothrix calamarisA sea urchin with banded spines and a rudimentary visual system.Echinothrix diademaLong-spined tropical urchin with blue-black sheen.Arbacia lixulaA black sea urchin with uniform spines and an anal valve.Arbacia nigraThe most common sea urchin on the coasts of Peru and Chile.Arbacia punctulataA spherical, dark purple-spined sea urchin used in developmental biology.Coelopleurus exquisitusDeepwater urchin discovered via eBay, prized for vivid colouration.
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