Diamond Trevally, Alectis indica (Rüppell 1830)


Other Names: Diamond Fish, Diamond-fish, High-brow Pennantfish, Indian Mirrorfish, Indian Threadfin, Indian Threadfish, Mirror Fish, Mirror-fish, Plumed Trevally, Threadfin Trevally

A Diamond Trevally, Alectis indica, from Mexico. Source: Gary Bulla / FishBase. License: CC BY Attribution-NonCommercial

Summary:

Adults have an angular, strongly compressed body, whereas young fish are almost diamond-shaped. Juveniles have extremely long filaments trailing from their dorsal, anal and pelvic fins - and they appear to mimic box jellyfish. The filaments gradually reduce as the fish grows and are absent in adult Diamond Trevally.

Video of juvenile Diamond Trevally, also known as Indian Threadfish.

While juveniles of the closely related Pennantfish, Alectis ciliaris, also have long trailing filaments on the dorsal and anal fins, they lack elongate filaments on the pelvic fins. Adult Pennantfish have a more rounded head profile, versus the more angular head profile of the Diamond Trevally.


Cite this page as:
Dianne J. Bray, Alectis indica in Fishes of Australia, accessed 23 Feb 2019, http://fishesofaustralia.net.au/Home/species/4254

Diamond Trevally, Alectis indica (Rüppell 1830)

More Info


Distribution

Known in Australia from the Houtman Abrolhos, WA (28º50´S) to Wollongong, NSW (34º26´S); also at Christmas Island in the Indian Ocean. Elsewhere, widespread in the Indo-West Pacific, from the Red Sea and East Africa to French Polynesia, north to southern Japan and south to northern Australia.

Adults are pelagic around reefs, while juveniles are found in a range of habitats, including estuaries and seagrass beds.

Fisheries

Of minor commercial importance in parts of its range, and aquacultured in Southeast Asia.

Similar Species

Similar to the closely related Pennantfish, Alectis ciliaris, that also has long trailing filaments on the dorsal and anal fins. Juvenile Pennantfish, however, lack elongate filaments on the pelvic fins. Adult Pennantfish have a more rounded head profile, versus the more angular head profile of the Diamond Trevally.

Species Citation

Scyris indicus Rüppell 1830, Fische des Rothen Meeres: 128, pl. 33(1). Type locality: Jidda, Saudi Arabia (as Djedda), Red Sea.

Author

Dianne J. Bray

Diamond Trevally, Alectis indica (Rüppell 1830)

References


Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Perth : Western Australian Museum 292 pp. 106 pls.

Allen, G.R. & M.V. Erdmann. 2012. Reef fishes of the East Indies. Perth, Australia: University of Hawai'i Press, Volumes I-III. Tropical Reef Research.

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

Blaber, S.J.M. & D.P. Cyrus. 1983. The biology of Carangidae (Teleostei) in Natal estuaries. Journal of Fish Biology 22(2): 173-188.

Chou, R. & H.B. Lee. 1997. Commercial marine fish farming in Singapore. Aquaculture Research (Blackwell Synergy) 28(10): 767-776.

Grant, E.M. 1975. Guide to Fishes. Brisbane : Queensland Government, Co-ordinator General’s Department 640 pp.

Grant, E.M. 2002. Guide to Fishes. Redcliffe : EM Grant Pty Ltd 880 pp.

Gunn, J.S. 1990. A revision of selected genera of the family Carangidae (Pisces) from Australian waters. Records of the Australian Museum, Supplement 12: 1-77

Hutchins, J.B. & Swainston, R. 1986. Sea Fishes of Southern Australia. Complete field guide for anglers and divers. Perth : Swainston Publishing 180 pp.

Johnson, J.W. 2010. Fishes of the Moreton Bay Marine Park and adjacent continental shelf waters, Queensland, Australia. pp. 299-353 in Davie, P.J.F. & Phillips, J.A. Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay. Memoirs of the Queensland Museum 54(3)

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia. Bathurst : Crawford House Press 437 pp.

Randall, J.E., Allen, G.R. & Steene, R. 1990. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 507 pp. figs.

Randall, J.E., Allen, G.R. & Steene, R. 1997. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 557 pp. figs.

Roughley, T.C. 1957. Fish and Fisheries of Australia. Sydney : Angus & Robertson 341 pp.

Rüppell, W.P.E. 1830. Atlas zu der Reise im nördlichen Afrika. Fische des Rothen Meeres. 3. Frankfurt : H.L. Brünner 95-141 pls 25-35.

Russell, B.C. & W. Houston. 1989. Offshore fishes of the Arafura Sea. The Beagle 6(1): 69-84.

Sainsbury, K.J., Kailola, P.J. & Leyland, G.G. 1985. Continental Shelf Fishes of Northern and North-Western Australia. Canberra : Fisheries Information Service 375 pp. figs & pls.

Smith-Vaniz, W.F. 1999. Family Carangidae. pp. 2659-2756 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. 4 2069-2790 pp.

Westernhagen, H. Von, 1974. Observations on the natural spawning of Alectis indicus (Rüppell) and Caranx ignobilis (Forsk.) (Carangidae). Journal of Fish Biology 6(4): 513–516. doi:10.1111/j.1095-8649.1974.tb04567.x

Quick Facts


CAAB Code:37337038

Depth:to 100 m

Fishing:Commercial and sports fish

Habitat:Pelagic, reef associated

Max Size:165 cm TL

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CAAB distribution map