Genus Sciadonus

Body long, slender, compressed; skin loose, transparent, scaleless. Lower jaw protruding; upper jaw ending below or slightly behind small, deepset eyes. Mouth almost horizontal; palatines edentate, vomer with or without small fangs, basibranchial tooth patches not developed. Pectoral peduncle about three times as long as high. Dorsal fin rays 68-107; caudal fin rays 5-7; anal fin rays 38-60; pectoral fin rays 9-16; pelvic fin rays 0-1. Anterior gill arch without long and with 12-15 very small rakers. Vertebral centra in adults almost rectangular in lateral view. Males with well-developed urogenital hood ventrally covering penis. Females with a pair of claspers at urogenital opening. 
Author: Bray, D.J. 2022

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Cite this page as:
Bray, D.J. 2022, Sciadonus in Fishes of Australia, accessed 20 Jul 2024,


Nielsen, J.G. 2018. Revision of the cosmopolitan deep-sea genus Sciadonus (Teleostei, Bythitidae) with two new species. Cybium 42(2): 177-187. See ref online

Nielsen, J.G. & Møller, P.R. 2008. New and rare deep-sea ophidiiform fishes from the Solomon Sea caught by the Danish Galathea 3 Expedition. Steenstrupia 30(1): 21-46.

Nielsen, J.G., Pogonoski, J.J. & Appleyard, S.A. 2019. Aphyonid-clade species of Australia (Teleostei, Bythitidae) with four species new to Australian waters and a new species of BarathronusZootaxa 4564(2): 554–572,