Caranx rhonchus  Geoffroy Saint-Hilaire, 1817

False scad
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Native range | All suitable habitat | Year 2100
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Caranx rhonchus   AquaMaps   Data sources: GBIF OBIS
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Image of Caranx rhonchus (False scad)
Caranx rhonchus
Picture by Luyben, J.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Carangidae (Jacks and pompanos) > Caranginae
Etymology: Caranx: French, carangue, the name of a Caribbean fish; 1836 (Ref. 45335).

Environment / Climate / Range Ecology

Marine; brackish; benthopelagic; depth range 30 - 200 m (Ref. 27584), usually 30 - 50 m (Ref. 26999).   Subtropical; 15°C - 22°C (Ref. 57055); 39°N - 22°S, 19°W - 36°E

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 20 - ? cm
Max length : 60.0 cm TL male/unsexed; (Ref. 57392); common length : 35.0 cm TL male/unsexed; (Ref. 3397); max. published weight: 1.0 kg (Ref. 27584)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 28-32; Anal spines: 3; Anal soft rays: 25 - 28. Diagnosis: body elongate and slightly compressed, its depth comprised from 3.8 to 4.4 times in fork length; eye posteriorly with a well developed adipose eyelid; 2 well separated dorsal fins, 1st with 8 spines, 2nd with 1 spine and 28-32 soft rays; anal fin with 2 detached spines, followed by 1 spine and 25-28 soft rays; last dorsal and anal ray transformed into a partially separate finlet, connected to the preceding ray by a low interradial membrane; pectoral fins short (comprised from 1.0 to 1.2 times in head length); scales small and cycloid; curved part of lateral line with 45-55 scales and 0-3 scutes, straight part with 0-8 scales and 24-32 scutes (Ref. 57392). Coloration: back brownish to olivaceous, sides light olivaceous to whitish; a narrow yellowish band sometimes extending from head to caudal-fin base; a black spot on upper margin of gill cover; a black blotch with a narrow light distal margin present on second dorsal-fin lobe (Ref. 57392).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Eastern Atlantic: Morocco to Angola (Ref. 4225, 57392), including the Mediterranean along the African coast. Range reported to extend south to Namibia (Ref. 27121).

Biology     Glossary (e.g. epibenthic)

Form schools. They occur frequently near the bottom, mostly in depths of 30 to 50 m. Also pelagic and found near the surface at times. Entering brackish-water lagoons and estuaries (Ref. 57392). Feed on small fish and invertebrates (Ref. 3195). Spawning grounds are located in shallow waters (Ref. 57055). Eggs are pelagic (Ref. 4233).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

A partial spawner (Ref. 57055).

Main reference Upload your references | References | Coordinator : Smith-Vaniz, William F. | Collaborators

Smith-Vaniz, W.F., J.-C. Quéro and M. Desoutter, 1990. Carangidae. p. 729-755. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 2. (Ref. 7097)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(fisheries: production; publication : search) | FIRMS (Stock assessments) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01950 (0.01532 - 0.02481), b=2.93 (2.90 - 2.96), based on LWR estimates for this species (Ref. 93245).
Trophic Level (Ref. 69278):  3.6   ±0.59 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.16-0.3; Fec = 480,000).
Vulnerability (Ref. 59153):  Moderate vulnerability (36 of 100) .
Price category (Ref. 80766):   Low.