Scientific Name
Caranx crysos

Common Name
Blue runner

Biology
A schooling species generally not far from the coast (Ref. 5217). Juveniles often found in association with floating Sargassum (Ref. 5217). Feed on fishes, shrimps, and other invertebrates. Spawn offshore from January through August (Ref. 26938). Eggs are pelagic (Ref. 4233). Excellent food fish (Ref. 9626); marketed fresh, frozen (Ref. 5521), and salted. Often used for bait (Ref. 26938).

Classification

Classified By

Mitchill, 1815

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Jacks and pompanos (Carangidae)

Distribution

Region

Eastern Atlantic

Distribution

Eastern Atlantic: Senegal to Angola, including the western Mediterranean, St. Paul's Rocks (Ref. 13121), and Ascension Island. Reported from Mauritania (Ref. 55783). Western Atlantic: Nova Scotia, Canada to Brazil (Ref. 7251), including the Gulf of Mexico (Ref. 9626) and the Caribbean. Also found in Argentina (Ref. 59355). In the tropical Eastern Pacific, it is replaced by Caranx caballus G?nther 1869, which may be conspecific.

Range

46°N - 26°S, 97°W - 32°E

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

100 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 0 - 100 m (Ref. 4233)

Trophic Level

4.4 s.e. 0.77 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

70.0 cm

Common Length

40.0 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: minor commercial; gamefish: yes; aquarium: public aquariums

Vulnerability

Low to moderate vulnerability (34 of 100)

Resilience

High, minimum population doubling time less than 15 months (K=0.32-0.38; tmax=11; Fec=41,000)

Threat To Humans

Reports of ciguatera poisoning (Ref. 30911)

IUCN Red List Status

Least Concern (LC)