Hydrolagus is a genus of fish in the family Chimaeridae found in the Atlantic Ocean, Indian Ocean and .[Weigmann, S. (2016): Annotated checklist of the living sharks, batoids and chimaeras (Chondrichthyes) of the world, with a focus on biogeographical diversity. Journal of Fish Biology, 88 (3): 837-1037.]. Visible on its snout are tiny pores which lead to electroreceptor cells.]]
Species
The 22 recognized species in this genus are:
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Hydrolagus affinis (Brito Capello (pt), 1868) (small-eyed rabbitfish)
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Hydrolagus africanus (Gilchrist, 1922) (African chimaera)
[Walovich, K.A., Ebert, D.A., Long, D.J. & Didier, D.A. (2015): Redescription of Hydrolagus africanus (Gilchrist, 1922) (Chimaeriformes: Chimaeridae), with a review of southern African chimaeroids and a key to their identification. African Journal of Marine Science, 37 (2): 157-165.]
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Hydrolagus alberti Bigelow & Schroeder, 1951 (gulf chimaera)
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Hydrolagus alphus Quaranta, Didier, Long & Ebert, 2006 (whitespot ghost shark)
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Hydrolagus barbouri (Garman, 1908) (ninespot chimaera)
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Hydrolagus bemisi Didier, 2002 (pale ghostshark)
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Hydrolagus colliei (G. T. Lay & E. T. Bennett, 1839) (spotted ratfish)
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Hydrolagus eidolon D. S. Jordan & C. L. Hubbs, 1925 (Niji Chimaera)
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Hydrolagus erithacus Walovich, Ebert & Kemper, 2017 (Robin's ghostshark)
[Walovich, K.A., Ebert, D.A. & Kemper, J.M. (2017): Hydrolagus erithacus sp. nov. (Chimaeriformes: Chimaeridae), a new species of chimaerid from the southeastern Atlantic and southwestern Indian oceans. Zootaxa, 4226 (4): 509–520.]
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Hydrolagus homonycteris Didier, 2008 (black ghostshark)
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Hydrolagus lusitanicus Teresa Moura, I. M. R. Figueiredo, Bordalo-Machado, A. C. Almeida & Serrano-Gordo, 2005 (Portuguese chimaera)
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Hydrolagus macrophthalmus F. de Buen, 1959 (bigeye chimaera)
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Hydrolagus marmoratus Didier, 2008 (marbled ghost shark)
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Hydrolagus matallanasi Soto & Vooren, 2004 (striped rabbitfish)
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Hydrolagus mccoskeri L. A. K. Barnett, Didier, Long & Ebert, 2006 (Galápagos ghostshark)
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Hydrolagus melanophasma K. C. James, Ebert, Long & Didier, 2009 (Eastern Pacific black ghostshark)
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Hydrolagus mirabilis (Robert Collett, 1904) (large-eyed rabbitfish)
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Hydrolagus mitsukurii (D. S. Jordan & Snyder, 1904) (Mitsukuri's chimaera)
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Hydrolagus novaezealandiae (Fowler, 1911) (dark ghostshark)
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Hydrolagus pallidus Hardy & Stehmann, 1990 (pale chimaera)
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Hydrolagus purpurescens (C. H. Gilbert, 1905) (purple chimaera)
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Hydrolagus trolli Didier & Séret (fr), 2002 (abyssal ghostshark)
Fossil remains of the genus are known from the Miocene and Pliocene of California.
[Popov, E. V., and G. T. Takeuchi. 2011. Miocene–early Pliocene chimaeroid fishes (Holocephali, Chimaeroidei) from California and a review of the global Neogene chimaeroid diversity and distribution. Journal of the Vertebrate Paleontology 31(Program and Abstracts):175.]
