Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Carangidae
(Jacks and pompanos)
Etymology: Megalaspis: Greek, megas, megalos = great + Greek, aspis,-idos = shield (Ref. 45335).
Environment / Climate / Range
Marine; brackish; reef-associated; depth range 20 - 100 m (Ref. 28016). Tropical; 47°N - 22°S, 40°E - 156°E (Ref. 54577)
Length at first maturity / Size / Weight / Age
Maturity: Lm 22.0  range ? - ? cm
Max length : 80.0 cm TL male/unsexed; (Ref. 3287); common length : 45.0 cm TL male/unsexed; (Ref. 5450); max. published weight: 4.0 kg (Ref. 4883)
soft rays: 16 - 17. Color bluish grey to green dorsally; silvery below; dark fins. Opercle with a large black spot. 51-59 strong, very large scutes. Anal fin with 2 detached spines (Ref. 2334). Numerous dorsal and anal finlets are distinct (Ref. 37816).
Indo-West Pacific: East Africa to Japan and Australia.
Primarily oceanic (Ref. 48635), lives near the surface of coastal waters (Ref. 3197, 11230). Forms schools and feeds mainly on fishes (Ref. 5213). Generally marketed fresh (Ref. 5284).
Paxton, J.R., D.F. Hoese, G.R. Allen and J.E. Hanley, 1989. Pisces. Petromyzontidae to Carangidae. Zoological Catalogue of Australia, Vol. 7. Australian Government Publishing Service, Canberra, 665 p.
IUCN Red List Status (Ref. 90363)
Threat to humans
Fisheries: highly commercial
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01363 (-0.01277 - 0.04002), b=2.91 (2.89 - 2.93), based on LWR estimates for this species (Ref. 93245
Trophic Level (Ref. 69278
): 4.4 ±0.8 se; Based on diet studies.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.13(?)-0.35;).
Vulnerability (Ref. 59153
): Moderate vulnerability (36 of 100) .