Scientific Name
Caranx ignobilis

Common Name
Giant trevally

Biology
Pelagic over sand and rock (Ref. 58302). Adults occur singly and inhabit clear lagoon and seaward reefs (Ref. 9710). Juveniles found in estuaries. Feed on crustaceans (like crabs and spiny lobsters) and fishes at night (Ref. 4887). Large individuals may be ciguatoxic. The largest trevally, reaching 1.7 m in length and a weight of over 60 kg (Ref. 48635). Spawn on shallow seaward reefs and offshore banks (Ref. 37816). Sold mostly fresh and dried salted.

Classification

Classified By

Forssk?l, 1775

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Jacks and pompanos (Carangidae)

Distribution

Region

Indo-Pacific

Distribution

Indo-Pacific: Red Sea and east coast of Africa to the Hawaiian and Marquesan islands, north to southern Japan (Ref. 559) and the Ogasawara Islands, south to northern Australia. Hybrid with Caranx melampygus found in Hawaii (Ref. 58422).

Range

35°N - 37°S

Environment

Climate

Tropical

Water Temperature From

26 °C

Water Temperature To

29 °C

Depth From - meters

10 m

Depth To - meters

188 m

Zone

reef-associated

Environment

Marine; brackish; reef-associated; depth range 10 - 188 m (Ref. 58302)

Trophic Level

4.22 s.e. 0.70 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

170 cm

Common Length

100.0 cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes; aquarium: public aquariums

Vulnerability

High to very high vulnerability (74 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (K=0.08-0.11; tm=3.5)

Threat To Humans

Reports of ciguatera poisoning (Ref. 9710)

IUCN Red List Status

Not Evaluated