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<!DOCTYPE html><html xmlns:og="http://ogp.me/ns#" lang="en" xml:lang="en"><head><title>ADW: Home</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type="text/javascript" src="//code.jquery.com/jquery-3.6.0.min.js"></script><script type="text/javascript" src="//code.jquery.com/jquery-migrate-3.3.2.min.js"></script><script type="text/javascript" src="/static/js/compat.js"></script><link rel="shortcut icon" href="https://animaldiversity.org/favicon.ico" /><link href="//fonts.googleapis.com/css?family=Gentium+Book+Basic:400,400italic,700,700italic" rel="stylesheet" type="text/css" /><link href="//fonts.googleapis.com/css?family=PT+Sans:400,700,400italic,700italic" rel="stylesheet" type="text/css" /><link rel="stylesheet" type="text/css" href="/static/bootstrap/css/bootstrap.css" /><link rel="stylesheet" href="/static/css/pica.styles.css" /><link rel="stylesheet" href="/static/css/pica.print.css" media="print" /> <link rel="stylesheet" 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data-height="480" data-width="505" alt="Photo of Gorgonocephalus arcticus" id="idm67" /></a></div><div class="img hidden"><a href="/accounts/Octopus_vulgaris/" style="width: 500px"><img src="/collections/contributors/jo_okeefe/octopus_101b4880/medium.jpg" data-height="480" data-width="720" alt="Photo of Octopus vulgaris" id="idm134" /></a></div><div class="img hidden"><a href="/accounts/Trematoda/" style="width: 500px"><img src="/collections/contributors/Grzimek_inverts/Trematoda/v01_id224_con_parasit/medium.jpg" data-height="437" data-width="640" alt="Photo of Trematoda" id="idm209" /></a></div><div class="img hidden"><a href="/accounts/Haliclona_oculata/" style="width: 500px"><img src="/collections/contributors/Grzimek_inverts/Demospongiae/Haliclona_oculata/medium.jpg" data-height="480" data-width="605" alt="Photo of Haliclona oculata" id="idm265" /></a></div><div class="img hidden"><a href="/accounts/Taeniura_lymma/" style="width: 500px"><img src="/collections/contributors/jeffrey_jeffords/fish/ray/medium.jpg" data-height="430" data-width="612" alt="Photo of Taeniura lymma" id="idm319" /></a></div><div class="img hidden"><a href="/accounts/Cyathopharynx_furcifer/" style="width: 500px"><img src="/collections/contributors/Grzimek_fish/Labroidei/LabroideiI/v04_id198_con_honeyco/medium.jpg" data-height="480" data-width="526" alt="Photo of Cyathopharynx furcifer" id="idm403" /></a></div><div class="img hidden"><a href="/accounts/Taricha_torosa/" style="width: 500px"><img src="/collections/contributors/Grzimek_herps/Salamandridae/T_torosa/medium.jpg" data-height="309" data-width="640" alt="Photo of Taricha torosa" id="idm494" /></a></div><div class="img hidden"><a href="/accounts/Crocodylus_niloticus/" style="width: 500px"><img src="/collections/contributors/Grzimek_herps/Crocodylidae/Crocodylus_niloticus/medium.jpg" data-height="440" data-width="640" alt="Photo of Crocodylus niloticus" id="idm592" /></a></div><div class="img hidden"><a href="/accounts/Psittacula_krameri/" style="width: 500px"><img src="/collections/contributors/david_behrens/Rose_ringed_Parakeet/medium.jpg" data-height="427" data-width="640" alt="Photo of Psittacula krameri" id="idm688" /></a></div><div class="img hidden"><a href="/accounts/Cervus_nippon/" style="width: 500px"><img src="/collections/contributors/david_blank/Cnipponfemales40/medium.jpg" data-height="368" data-width="550" alt="Photo of Cervus nippon" id="idm801" /></a></div><div class="img hidden"><a href="/accounts/Ufeus_satyricus/" style="width: 500px"><img src="/collections/contributors/phil_myers/Noctuidae/Ufeus2888/medium.jpg" data-height="480" data-width="482" alt="Photo of Ufeus satyricus" id="idm917" /></a></div><div class="img hidden"><a href="/accounts/Penaeus_monodon/" style="width: 500px"><img src="/collections/contributors/Grzimek_inverts/Decapoda/Penaeus_monodon/medium.jpg" data-height="365" data-width="640" alt="Photo of Penaeus monodon" id="idm991" /></a></div><div class="img hidden"><a href="/accounts/Xysticus/" style="width: 500px"><img src="/collections/contributors/phil_myers/araneae/Xysticus0113/medium.jpg" data-height="480" data-width="600" alt="Photo of Xysticus" id="idm1072" /></a></div><div class="img hidden"><a href="/accounts/Calliactis_tricolor/" style="width: 500px"><img src="/collections/contributors/jo_okeefe/anemone_dsc_0002/medium.jpg" data-height="458" data-width="482" alt="Photo of Calliactis tricolor" id="idm1142" /></a></div><div class="img" style="min-width: 663"><a href="/accounts/Paragordius_varius/" style="width: 500px"><img src="/collections/contributors/Grzimek_inverts/Nectonematoida/Paragordius_varius_ends/medium.jpg" data-height="480" data-width="663" alt="Photo of Paragordius varius" id="idm1200" /></a></div></div><div id="mosaic-caption" class="row-fluid"><div class="span1"><a href="#" class="prev-image"><img alt="Previous" src="/static/img/arrow_left.png" height="32" width="32" /></a></div><div class="span10"><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Annelida</span><span class="vernacular-name">segmented worms</span></div><div class="identified-taxa"><a class="taxon-name rank-Genus" href="/accounts/Myrianida/">Myrianida</a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Echinodermata</span><span class="vernacular-name">starfish, sea urchins, and relatives</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Gorgonocephalus_arcticus/">Gorgonocephalus arcticus<span class="vernacular-name">northern basket star</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Mollusca</span><span class="vernacular-name">bivalves, cephalopods, snails, and relatives</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Octopus_vulgaris/">Octopus vulgaris</a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Platyhelminthes</span><span class="vernacular-name">flatworms</span></div><div class="identified-taxa"><a class="taxon-name rank-Class" href="/accounts/Trematoda/">Trematoda</a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Porifera</span><span class="vernacular-name">sponges</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Haliclona_oculata/">Haliclona oculata<span class="vernacular-name">Geweihschwamm</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Chondrichthyes</span><span class="vernacular-name">rays, sharks, and relatives</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Taeniura_lymma/">Taeniura lymma<span class="vernacular-name">Fantail ray</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Actinopterygii</span><span class="vernacular-name">ray-finned fishes</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Cyathopharynx_furcifer/">Cyathopharynx furcifer<span class="vernacular-name">Featherfin cichlid</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Amphibia</span><span class="vernacular-name">frogs, salamanders, and caecilians</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Taricha_torosa/">Taricha torosa<span class="vernacular-name">California Newt</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Reptilia</span><span class="vernacular-name">turtles, snakes, lizards, and relatives</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Crocodylus_niloticus/">Crocodylus niloticus<span class="vernacular-name">Nile crocodile</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Aves</span><span class="vernacular-name">birds</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Psittacula_krameri/">Psittacula krameri<span class="vernacular-name">rose-ringed parakeet</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Mammalia</span><span class="vernacular-name">mammals</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Cervus_nippon/">Cervus nippon<span class="vernacular-name">sika deer</span></a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Class">Insecta</span><span class="vernacular-name">insects</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Ufeus_satyricus/">Ufeus satyricus</a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Crustacea</span><span class="vernacular-name">crustaceans</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Penaeus_monodon/">Penaeus monodon</a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Chelicerata</span><span class="vernacular-name">chelicerates</span></div><div class="identified-taxa"><a class="taxon-name rank-Genus" href="/accounts/Xysticus/">Xysticus</a></div></div><div style="text-align: center" class="identification hidden"><div class="higher-taxa"><span class="taxon-name rank-Phylum">Cnidaria</span><span class="vernacular-name">jellyfish, sea anemones, corals, and relatives</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Calliactis_tricolor/">Calliactis tricolor<span class="vernacular-name">hermit anemone</span></a></div></div><div style="text-align: center" class="identification"><div class="higher-taxa"><span class="taxon-name rank-Unspecified">Other animal phyla</span></div><div class="identified-taxa"><a class="taxon-name rank-Species" href="/accounts/Paragordius_varius/">Paragordius varius</a></div></div></div><div class="span1"><a href="#" class="next-image"><img alt="Next" src="/static/img/arrow_right.png" height="32" width="32" /></a></div></div><div id="mosaic-menu" class="row-fluid" style="text-align: left"><div class="span4"><ul class="menu unstyled"> <li> <a href="/accounts/Annelida/">Annelida</a><span class="vernacular-name">segmented worms</span> </li> <li> <a href="/accounts/Echinodermata/">Echinodermata</a><span class="vernacular-name">starfish, sea urchins, and relatives</span> </li> <li> <a href="/accounts/Mollusca/">Mollusca</a><span class="vernacular-name">bivalves, cephalopods, snails, and relatives</span> </li> <li> <a href="/accounts/Platyhelminthes/">Platyhelminthes</a><span class="vernacular-name">flatworms</span> </li> <li> <a href="/accounts/Porifera/">Porifera</a><span class="vernacular-name">sponges</span> </li> </ul></div><div class="span4"><ul class="menu unstyled"> <li> <a href="/accounts/Chondrichthyes/">Chondrichthyes</a><span class="vernacular-name">rays, sharks, and relatives</span> </li> <li> <a href="/accounts/Actinopterygii/">Actinopterygii</a><span class="vernacular-name">ray-finned fishes</span> </li> <li> <a href="/accounts/Amphibia/">Amphibia</a><span class="vernacular-name">frogs, salamanders, and caecilians</span> </li> <li> <a href="/accounts/Reptilia/">Reptilia</a><span class="vernacular-name">turtles, snakes, lizards, and relatives</span> </li> <li> <a href="/accounts/Aves/">Aves</a><span class="vernacular-name">birds</span> </li> <li> <a href="/accounts/Mammalia/">Mammalia</a><span class="vernacular-name">mammals</span> </li> </ul></div><div class="span4"><ul class="menu unstyled"> <li> <a href="/accounts/Insecta/">Insecta</a><span class="vernacular-name">insects</span> </li> <li> <a href="/accounts/Crustacea/">Crustacea</a><span class="vernacular-name">crustaceans</span> </li> <li> <a href="/accounts/Chelicerata/">Chelicerata</a><span class="vernacular-name">chelicerates</span> </li> <li> <a href="/accounts/Cnidaria/">Cnidaria</a><span class="vernacular-name">jellyfish, sea anemones, corals, and relatives</span> </li> <li> <a href="/accounts/Nematoda/">Nematoda</a><span class="vernacular-name">roundworms</span> </li> </ul></div></div><div class="row-fluid"><div class="centered" style="border-top: 1px dotted #CCC; width: 80%; margin-left: auto; margin-right: auto; margin-bottom: .5em; margin-top: .5em; padding: 0.5em"><a href="/accounts/group/Other-animal-phyla/"> Other animal phyla </a></div></div></div></div></div></div><div class="span2_5 right sidebar"><h2 class="offscreen">Search</h2><div id="site-search"><form action="/search/" method="GET"><label for="q" class="offscreen">Enter search text</label><input value="" id="q" name="q" class="span12" size="15" type="text" placeholder="Search ADW" /><button class="btn"><i class="icon-zoom-in"></i><span class="offscreen">Search</span></button><p style="max-height: 35px"><label for="feature-list" class="offscreen">Search in feature</label><select size="1" name="feature" class="feature-list input-medium" id="feature-list"><option value="INFORMATION">Taxon Information</option><option value="COLLECTIONS">Contributor Galleries</option><option value="TOPICS">Topics</option><option value="CLASSIFICATION">Classification</option></select></p></form><ul class="unstyled"><li><a href="https://animaldiversity.ummz.umich.edu/quaardvark/">Explore Data @ Quaardvark</a></li><li><a href="/search_guide/">Search Guide</a></li></ul></div><div class="well"><h3>ADW Mission</h3><p> The Animal Diversity Web is an online database and encyclopedia of animal natural history, built through contributions from students, photographers, and many others. </p><p> It is a rich and flexible resource designed both as an encyclopedia for exploring biodiversity and for use in formal, inquiry-based education. </p></div></div></div></div></div><div id="footer" aria-role="contentinfo"><div class="inner-footer"><div class="footer-links"><ul class="unstyled"><li><a 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