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Shadow trevally
Carangoides dinema Bleeker, 1851
Also calledCarangue crépuscule (fra) · Jurel Crepúsculo (spa) · イトヒラアジ (jpn)
First described in: Bleeker, P. (1851). Over eenige nieuwe geslachten en soorten van Makreelachtige visschen van den Indischen Archipel. <em>Natuurkundig Tijdschrift voor Nederlandsch Indië.</em> v. 1 (no. 4): 341-372.
The shadow trevally (Carangichthys dinema), also known as the shadow kingfish, twothread trevally or Aldabra trevally, is a species of inshore marine fish in the jack family Carangidae. The species is patchily distributed throughout the tropical and subtropical waters of the Indian and west Pacific Oceans, from South Africa in the west to Japan and Samoa in the east, reaching as far south as Indonesia and New Caledonia. It is most easily distinguished from similar species by as series of dark rectangular blotches under the second dorsal fin, giving a 'shadowed' appearance, from which its common name is derived. The shadow trevally is a reasonably large fish, growing to 85 cm in length and at least 2.6 kg in weight. It inhabits shallow coastal waters, including reefs, bays, and estuaries, where it takes small fish and benthic crustaceans as prey. Nothing is known of the species' ecology and reproductive biology. It is of little importance to fisheries, and is occasionally taken by bottom trawls and other artisanal fishing gear.
Descriptions from checklists and floras indexed by GBIF
distribution
Distribution and habitat. New Ireland: 5. — General distribution: East Africa to Tonga and Samoa, southern Indonesia to Ryukyu Islands. Found in small groups in coastal water including estuaries, 1 – 22 m depth. Transitional water and marine.
Checklist of the marine and estuarine fishes of New Ireland Province, Papua New Guinea, western Pacific Ocean, with 810 new records
materials_examined
Status at New Ireland. First recorded from Lihir Group, Namatamai District, New Ireland by Fry et al. (2006: 129).
Checklist of the marine and estuarine fishes of New Ireland Province, Papua New Guinea, western Pacific Ocean, with 810 new records
From Wikipedia (CC BY-SA), quoted section by section
Description
The shadow trevally is similar in form to a number of other jacks in the family Carangidae, having an almost ovate, strongly compressed body. It is fairly large fish, growing to a maximum known length of 85 cm and a recorded weight of 2.6 kg. The dorsal profile is strongly convex, while the ventral profile is less so, even tending to be concave between the snout and the anal fin, while the nape is elevated and almost straight in profile. There are two separate dorsal fins, the first consisting of 8 spines and second of a single spine and 17 to 19 soft rays. The lobe of the second dorsal fin is elongated, being greater than the head length. The anal fin is composed of two anteriorly detached spines followed by a single spine and 15 to 17 soft rays. The lateral line has a moderate arch anteriorly, with the junction of the curved and straight sections below the tenth or twelfth soft rays of the second dorsal fin. The curved section of the lateral line is slightly longer than the straight section, and contains 60 to 63 scales, while the straight part contains no to six scales followed by 23 to 30 scutes. The breast is devoid of scales ventrally to behind the pelvic fin origin and up to the pectoral fin base, although in rare cases this is interrupted by a lateral band of scales. …
Range & habitat
The shadow trevally is distributed patchily throughout the tropical to subtropical waters of the Indian and west Pacific Oceans. The species' westernmost limit is a section of the east African coast from South Africa to Tanzania. No records exist for the species further north until India and Sri Lanka. In the Pacific, the species is known from China, Korea, Southeast Asia, and the Indonesian and Philippines island chains. Its easternmost limit extends to Taiwan and Japan in the north and a number of small island groups including Tonga and Samoa in the south. The shadow trevally inhabits coastal waters at depths generally less than 15 m. It is known to Kruise in small schools along the shallow edge of steep reef drop-offs, and has also been recorded from bays and estuaries. The species has been recorded around shipwrecks, and one study showed it was one of the first fish to move in after a ship was scuttled.
Where it has been recorded
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Carangoides dinema in the Biodiversity Heritage Library →
From the GBIF Backbone Taxonomy and occurrence records (GBIF.org), with Wikipedia and the Source Library. GBIF species 5210534.