{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T21:24:27Z","timestamp":1783027467597,"version":"3.54.6"},"reference-count":37,"publisher":"Pensoft Publishers","license":[{"start":{"date-parts":[[2025,3,13]],"date-time":"2025-03-13T00:00:00Z","timestamp":1741824000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ZK"],"abstract":"<jats:p>Two new extremely elongate snake eel of the genus <jats:italic>Ophichthus<\/jats:italic> are described based on specimens collected from Vietnamese waters. <jats:italic>Ophichthus cuulongensis<\/jats:italic> Vo, Hibino &amp; Ho, <jats:bold>sp. nov.<\/jats:bold> is distinguished from its congeners by having the dorsal-fin origin slightly behind the pectoral-fin tip, mean vertebral formula 14-63-202, range 12\u201317\/60\u201364\/199\u2013207; teeth on jaws biserial to triserial; dorsal body dark brown, ventral body pale, anal fin initially white but changing to darker towards its tip. <jats:italic>Ophichthus nguyenorum<\/jats:italic> Vo, Hibino &amp; Ho, <jats:bold>sp. nov.<\/jats:bold> is distinguished by having a snout rather pointed but the occipital convex (duck-shaped); body with numerous longitudinal wrinkles, weak on posterior abdomen; dorsal-fin origin slightly behind the pectoral-fin tip; one row of teeth on the maxilla anteriorly but increasing posteriorly; two rows on the lower jaw; all teeth small; body dark, usually including abdomen; dorsal fin darker with dark margin; anal fin initially pale but changing to darker towards tip; mean vertebral formula: 15-62-192, range 13\u201317\/61\u201364\/190\u2013196. Descriptions of two related species, <jats:italic>O. macrochir<\/jats:italic> (Bleeker, 1852) and <jats:italic>O. rutidoderma<\/jats:italic> (Bleeker, 1852), are provided with updated morphological data.<\/jats:p>","DOI":"10.3897\/zookeys.1231.137323","type":"journal-article","created":{"date-parts":[[2025,3,13]],"date-time":"2025-03-13T16:30:17Z","timestamp":1741883417000},"page":"311-329","source":"Crossref","is-referenced-by-count":1,"title":["Two new snake eels (Anguilliformes, Ophichthidae, Ophichthus) from Viet Nam, with redescriptions of O. macrochir (Bleeker) and O. rutidoderma (Bleeker)"],"prefix":"10.3897","volume":"1231","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9680-6898","authenticated-orcid":true,"given":"Quang Van","family":"Vo","sequence":"first","affiliation":[{"name":"Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5670-3851","authenticated-orcid":true,"given":"Yusuke","family":"Hibino","sequence":"additional","affiliation":[{"name":"Kitakyushu Museum of Natural History and Human History, Kitakyushu, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1154-601X","authenticated-orcid":true,"given":"Hsuan-Ching","family":"Ho","sequence":"additional","affiliation":[{"name":"National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan"},{"name":"Australia Museum, Sydney, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9985-4668","authenticated-orcid":true,"given":"Thao Thu Thi","family":"Le","sequence":"additional","affiliation":[{"name":"Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2976-4448","authenticated-orcid":true,"given":"Ying Giat","family":"Seah","sequence":"additional","affiliation":[{"name":"Universiti Malaysia Terengganu, Kuala Nerus, Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2258","published-online":{"date-parts":[[2025,3,13]]},"reference":[{"key":"137323_B1","doi-asserted-by":"publisher","DOI":"10.1896\/054.064.0104"},{"key":"137323_B2","doi-asserted-by":"publisher","DOI":"10.5343\/bms.2023.0084"},{"key":"137323_B3","first-page":"1","article-title":"Bijdrage tot de kennis der Muraeno\u00efden en Symbrancho\u00efden van den Indischen Archipel.","volume":"25","author":"Bleeker","year":"1852","journal-title":"Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen"},{"key":"137323_B4","first-page":"31","article-title":"Vertebral formulae of type specimens of eels (Pisces: Anguilliformes).","volume":"134","author":"B\u00f6hlke","year":"1982","journal-title":"Proceedings of the Academy of Natural Sciences of Philadelphia"},{"key":"137323_B5","first-page":"1","article-title":"A review of the Apodal fishes of Kwangtung.","volume":"1","author":"Chen","year":"1929","journal-title":"Bulletin of the Biology Department, Science College, Sun Yatsen University"},{"key":"137323_B6","author":"Fricke","year":"2024"},{"key":"137323_B7","author":"G\u00fcnther","year":"1870"},{"key":"137323_B8","doi-asserted-by":"publisher","DOI":"10.5962\/bhl.title.59540"},{"key":"137323_B9","first-page":"118","article-title":"Ophichthidae.","author":"Hibino","year":"2019","journal-title":"National Museum of Marine Biology & Aquarium, Pingtung"},{"key":"137323_B10","doi-asserted-by":"publisher","DOI":"10.1007\/s10228-018-00677-3"},{"key":"137323_B11","doi-asserted-by":"publisher","DOI":"10.11646\/zootaxa.4702.1.17"},{"key":"137323_B12","doi-asserted-by":"publisher","DOI":"10.3897\/zookeys.1220.126337"},{"key":"137323_B13","doi-asserted-by":"publisher","DOI":"10.26107\/RBZ-2022-0015"},{"key":"137323_B14","doi-asserted-by":"publisher","DOI":"10.1111\/jfb.15617"},{"key":"137323_B15","doi-asserted-by":"publisher","DOI":"10.1007\/s10228-023-00927-z"},{"key":"137323_B16","first-page":"549","article-title":"A new ophichthid eel, Ophichthus rotundus (Ophichthidae, Anguilliformes) from Korea.","volume":"1","author":"Lee","year":"1997","journal-title":"Korean Journal of Biological Sciences"},{"key":"137323_B17","author":"Mai","year":"1992","journal-title":"Identification of freshwater fish species, Southern region, Viet Nam (\u0110\u1ecbnh lo\u1ea1i c\u00e1c lo\u00e0i c\u00e1 n\u01b0\u1edbc ng\u1ecdt Nam b\u1ed9)."},{"key":"137323_B18","doi-asserted-by":"publisher","DOI":"10.1643\/0045-8511(2007)7[783:ANDSOT]2.0.CO;2"},{"key":"137323_B19","doi-asserted-by":"publisher","DOI":"10.11646\/zootaxa.2505.1.1"},{"key":"137323_B20","first-page":"101","article-title":"Family Ophichthidae, Snake-eels, sand-eels and worm-eels.","author":"McCosker","year":"2022","journal-title":"Vol. 2. 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