Chromis fieldi Randall & DiBattista 2013


Other Names: Two-Tone Chromis

Chromis fieldi in Sodwana Bay, KwaZulu-Natal, South Africa. Source: Sally Polack / FishWise Professional. License: CC BY Attribution-Noncommercial-ShareAlike 3.0

Summary:
Chromis fieldi differs from the Red Sea endemic, Chromis dimidiata, in having a more curved delineation between the black and white body coloration, with the white colour diffusing more anteriorly into the dorsal fin. C. fieldi also has slightly more dorsal-fin spines, pectoral-fin rays and lateral line scales than C. dimidiata.

Cite this page as:
Bray, D.J. 2018, Chromis fieldi in Fishes of Australia, accessed 21 Jul 2019, http://fishesofaustralia.net.au/home/species/4855

Chromis fieldi Randall & DiBattista 2013

More Info


Distribution

Widespread in the Indian Ocean from East Africa to Indonesia, including the Australian territory of Christmas Island in the eastern Indian Ocean.
The Two-Tone Chromis inhabits lagoons and outer reefs, although not in areas exposed to heavy wave action. The species sometimes forms large feeding aggregations along the rim of dropoffs. 

Colour

Pale blue on the leading edge of the dorsal and anal-fin spines and along the margin of the anterior soft portion of the median fins, bluish white posterior margin of the black axillary spot, faint dark longitudinal banding on the rows of scales of the postorbital head; also a faint bluish irridescence on the upper lip and suborbital.

Feeding

Feeds on zooplankton in the water column just above the reef.

Similar Species

Similar to Chromis dimidiata, which is restricted to the Red Sea. Also similar to C. iomelas, which occurs in the Western Pacific from the Great Barrier Reef, Australia, north to Papua New Guinea, New Caledonia, Vanuatu, Fiji, Samoa, Society Islands and the Tuamotos. C. iomelas is not found north of New Guinea, nor in the islands of Micronesia.
C. fieldi differs from C. dimidiata in having 17 pectoral-fin rays and 17 tubed lateral line scales (vs modally 15 for C. dimidiata), and the dark brown/white demarcation is relatively straight in C. dimidiata vs more convex in C. fieldi.
C. iomelas has 12 dorsal-fin spines (vs 13-14 in C. fieldi and C. dimidiata) and the dark/light demarcation occurs beforethe anal-fin origin, and the tips of the pectoral fins extend into the white area in C. iomelas.

Etymology

Named in honour of Richard Field, the first to suspect that the Indian Ocean population of Chromis dimidiata might represent a different species.

Species Citation

Chromis fieldi Randall & DiBattista 2013, aqua, Int. J. Ichthyol. 19(1): 5, Figs. 4-9. Type locality: West coast off Medine (north of Flic en Flac), Mauritius, depth 30 metres.

Author

Bray, D.J. 2018

Chromis fieldi Randall & DiBattista 2013

References


Allen, G. R. 2001. Family Pomacentridae. pp. in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 6 pp. 3381-4218. (3343, as Chromis dimidiata)

Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp. (579 asChromis dimidiata)

Allen, G.R., Steene, R.C. & Orchard, M. 2007. Fishes of Christmas Island. Christmas Island : Christmas Island Natural History Association 2 edn, 284 pp. (as Chromis dimidiata)

Allen, G.R. & Steene, R.C. 1987. Reef fishes of the Indian Ocean. A pictorial guide to the common reef fishes of the Indian Ocean. Neptune City, New Jersey : T.F.H. Publications 240 pp. (92, fig. 257, as Chromis dimidiata)

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. [358] (as Chromis dimidiata)

Randall, J.E. & J.D. DiBattista. 2013. A new species of damselfish (Pomacentridae) from the Indian Ocean. aqua, International Journal of Ichthyology 19(1): 1-16.

Quick Facts


CAAB Code:37372146

Depth:1-40 m

Habitat:Coral reef

Habitat:Reef associated

Max Size:6 cm SL

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