Asteroidea (sea stars and starfishes) (2,425)   (1)   (2)
Crinoidea (feather stars and sea lillies) (2,188)
Echinoidea (heart urchins, sand dollars, and sea urchins) (3,939)
Holothuroidea (sea cucumbers) (2,349)   (7)
Ophiuroidea (basket stars, brittlestars, and snake stars) (2,630)

Achradocystitidae (2)
Agelacrinitidae (21)
Allanicytidiidae (1)
Amygdalocystitidae (3)
Amygdalothecidae (1)
Anomalocystidae (2)
Anomalocystitidae (4)
Apycnodiscidae (11)
Archegonasteridae (1)
Archophiactinidae (1)
Aristocystitidae (17)
Astrocrinidae (3)
Astrocystitidae (1)
Barroubiocystidae (2)
Blastocystidae (5)
Brachyschismatidae (1)
Callocystitidae (5)
Caryocystitidae (21)
Catervaparmasteridae (1)
Ceratocystidae (2)
Cheirocrinidae (17)
Codasteridae (14)
Comarocystidae (1)
Cothurnocystidae (12)
Ctenocystidae (4)
Cuniculcystidae (1)
Dactylocystidae (2)
Dendrocystitidae (3)
Dibrachicystidae (3)
Echinoencrinitidae (10)
Echinosphaeritidae (8)
Edrioasteridae (2)
Eocrinidae (19)
Eucladiidae (6)
Eumorphocystidae (1)
Falloasteridae (1)
Felbabkacystidae (1)
Glyptocystidae (1)
Glyptocystitidae (10)
Glyptosphaeritidae (3)
Gomphocystitidae (4)
Granatocrinidae (14)
Gyrocystidae (9)
Heckeritidae (1)
Heckerocrinidae (8)
Helicocystitidae (1)
Helicoplacidae (2)
Hemicystitidae (5)
Holocystitidae (6)
Hyperoblastidae (1)
Irregularia (5)
Isorophidae (1)
Jaekelocarpidae (1)
Jugoszoviidae (1)
Kirkocystidae (5)
Lebetodiscidae (1)
Lepidocystidae (2)
Lichenoididae (2)
Linguaserridae (3)
Lingulocystidae (3)
Lyracystidae (3)
Macrocystellidae (8)
Malocystidae (2)
Mitrocystitidae (1)
Moroccodiscidae (1)
Neoschismatidae (9)
Nicolleaumatidae (2)
Nucleocrinidae (2)
Orbitremitidae (2)
Orophocrinidae (11)
Parasphaeronitiidae (2)
Pediculacaudinidae (1)
Pentremitidae (9)
Phaenoschismatidae (24)
Phyllocystidae (1)
Placocystitidae (3)
Plasiacystidae (1)
Pleurocystitidae (25)
Protocrinitidae (5)
Punctatidae (3)
Rhenopyrgidae (3)
Rhenosquamidae (4)
Rhopalocystidae (6)
Ridersiidae (1)
Rotasacciidae (6)
Rozanovicystidae (1)
Schizoblastidae (4)
Scotiaecystidae (1)
Semperitidae (4)
Sollasinidae (5)
Sphaeronitidae (34)
Springerocystidae (2)
Steganoblastidae (3)
Stephanoblastidae (2)
Stephanocrinidae (5)
Stichopitidae (1)
Stromatocystitidae (6)
Sucocystidae (13)
Syringocrinidae (2)
Totiglobidae (2)
Trachelocrinidae (2)
Trochocystitidae (4)
Troosticrinidae (2)
Tubocaudinidae (1)
Westgardellidae (1)
Yorkicystitidae (1)

Acentrotremites (1)
Amadeusicrinus (1)
Angioblastus (6)
Angulatoblastus (1)
Anthoblastus (2)
Aragocystites (1)
Arauricystis (1)
Arcuoblastus (1)
Artuschisma (1)
Aspidocarpus (2)
Asteroblastus (1)
Astrocrinus (1)
Ateleocystites (2)
Auloblastus (1)
Barrandeocarpus (1)
Bolboporites (2)
Branzoviella (1)
Breimeriblastus (3)
Calycoblastus (1)
Cambroblastus (2)
Cambrocrinus (1)
Camptostroma (3)
Cantabrigiaster (1)
Cardiocystites (1)
Ceratoblastus (1)
Chatsworthia (1)
Coelaster (1)
Coleicarpus (1)
Conoblastus (1)
Costatoblastus (1)
Courtessolea (1)
Cribroblastus (1)
Ctenoimbricata (1)
Cymbionites (1)
Davidocinctus (1)
Decemoblastus (1)
Deliablastus (1)
Dentiblastus (2)
Dianchicystis (1)
Dolichoblastus (1)
Drepanocrinus (4)
Echinasterella (2)
Eldonia (2)
Eleutherocrinus (1)
Emuhablastus (1)
Eocystites (1)
Eometacrinus (1)
Etoctenocystis (1)
Euryoblastus (1)
Eustypocystis (1)
Flabellocrinites (1)
Furca (1)
Globoblastus (1)
Glyptosphaeronites (1)
Gongyloblastus (1)
Graciacystis (1)
Hadrodiscus (1)
Haimacystis (1)
Hexedriocystis (2)
Imperatoria (7)
Jaekelaster (1)
Kailidiscus (1)
Katoblastus (2)
Lehmannaster (1)
Lepidocystis (1)
Leptoschisma (1)
Llanocystis (1)
Lobocarpus (1)
Lopidiaster (1)
Luhocrinus (1)
Macurdablastus (1)
Marjumicystis (1)
Mastoblastus (1)
Metablastus (2)
Nevadaecystis (1)
Nolichuckia (1)
Ocellothuria (1)
Ovocarpus (1)
Pachyblastus (1)
Pareocrinus (1)
Pentablastus (1)
Pentremoblastus (1)
Peridionites (1)
Perittoblastus (1)
Phaenoblastus (3)
Polycerus (1)
Polydeltoideus (2)
Promitrocystites (1)
Protocystites (1)
Protorophus (1)
Pterotoblastus (4)
Pyramiblastus (1)
Rhipidocystis (2)
Sanducystis (1)
Scoteinocystis (1)
Sinopetaloblastus (1)
Sinorbitremites (1)
Strongyloblastus (1)
Sumsaricystis (1)
Tanaoblastus (1)
Tripoblastus (1)
Tympanoblastus (1)
Ubaghsicystis (1)
Vetulocystis (1)
Vizcainocarpus (3)
Wudingeocrinus (1)
Xenoblastus (1)
Xyeleblastus (1)
Yunnanechinus (1)

(...) = Species count
(...) = Endangered count
(...) = Invasive count