Dwarf Squirrelfish, Sargocentron iota Randall 1998
A Dwarf squirrelfish, Sargocentron iota, from Mururoa Atoll, French Polynesia - USNM 408297. Source: Jeffrey T. Williams / Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes. License: CC by Attribution-NonCommercial-ShareAlike
Summary:
A small red squirrelfish with very narrow darker red stripes along the side, each between the scale rows, a reddish spinous dorsal fin with faint white mottling and a broad deep red margin. The caudal-fin lobes are broadly rounded.
The Dwarf Squirrelfish has been recorded from the Australian Territory of Christmas Island in the eastern Indian Ocean.
The Dwarf Squirrelfish has been recorded from the Australian Territory of Christmas Island in the eastern Indian Ocean.
Cite this page as:
Bray, D.J. 2019, Sargocentron iota in Fishes of Australia, accessed 20 Apr 2024, https://fishesofaustralia.net.au/home/species/5136
Dwarf Squirrelfish, Sargocentron iota Randall 1998
More Info
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Distribution |
Australian territory of Christmas Island in the eastern Indian Ocean. Elsewhere the species occurs in the tropical east-Indo west central Pacific. This small secretive squirrelfish inhabits steep outer reef slopes, usually remaining close to shelter, even at night. |
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Features |
Dorsal fin XI, 12-14; Anal fin IV, 9; Vertebrae 27. Body depth 2.3-2.6 in SL; head length 2.5-2.6 in SL. 4-5 oblique rows of scales on cheek; anterior end of nasal bone rounded; moderately large and spineless nasal fossa; surface of nasal bone between fossa and edge of premaxillary groove with a prominent retrorse spine; median edge of nasal bone (margin of premaxillary groove) with a small recumbent retrorse spine; longest dorsal-fin spine 2.05-2.75 in head length; third anal-fin spine 1.5-1.6 in head length; broadly rounded caudal fin lobes; scales strongly serrated. |
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Colour |
Body red with a very narrow darker red stripe separating longitudinal scale rows; spinous part of dorsal fin red; mottled faintly with white, the outer part of each membrane deeper red; remaining fins with red rays and clear membranes. |
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Etymology |
The species is named iota for the smallest letter in the Greek alphabet. |
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Species Citation |
Sargocentron iota Randall 1998, Indo-Pacific Fishes 27: 36, pl. 3 (fig. B). fig. 13. Type locality: off Kahe Point Beach Park, Oahu, Hawaiian Islands. |
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Author |
Bray, D.J. 2019 |
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Resources |
Dwarf Squirrelfish, Sargocentron iota Randall 1998
References
Allen, G.R., Steene, R.C. & Orchard, M. 2007. Fishes of Christmas Island. Christmas Island : Christmas Island Natural History Association 2 edn, 284 pp.
Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp.
Hobbs, J-P.A., Newman, S.J., Mitsopoulos, G.E.A., Travers, M.J., Skepper, C.L., Gilligan, J.J., Allen, G.R., Choat, H.J. & Ayling, A.M. 2014. Checklist and new records of Christmas Island fishes: the influence of isolation, biogeography and habitat availability on species abundance and community composition. Raffles Bulletin of Zoology Supplement 30: 184–202
Myers, R.F. 1999. Micronesian Reef Fishes. A comprehensive guide to the coral reef fishes of Micronesia. Guam : Coral Graphics vi 330 pp. 192 pls.
Randall, J.E. 1998. Revision of the Indo-Pacific squirrelfishes (Beryciformes: Holocentridae: Holocentrinae) of the genus Sargocentron, with descriptions of four new species. Indo-Pacific Fishes 27: 1-105 pls 1-11
Randall, J.E. 2005. Reef and shore fishes of the South Pacific. New Caledonia to Tahiti and the Pitcairn Islands. Honolulu : University of Hawaii Press 707 pp.
Williams, I. & Greenfield, D. 2016. Sargocentron iota (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T67902088A115443362. http://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T67902088A67906312.en. Downloaded on 26 February 2019.
