You can sponsor this page

Equetus lanceolatus  (Linnaeus, 1758)

Jack-knifefish
Add your observation in Fish Watcher
Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Equetus lanceolatus   AquaMaps   Data sources: GBIF OBIS
Upload your photos and videos
Pictures | Stamps, Coins | Google image
Image of Equetus lanceolatus (Jack-knifefish)
Equetus lanceolatus
Picture by Flescher, D.

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

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Sciaenidae (Drums or croakers)
Etymology: Equetus: Latin, eques, -itis = horse, man in a horse, chevalier .

Environment / Climate / Range Ecology

Marine; reef-associated; depth range 10 - 60 m (Ref. 7251).   Tropical; 37°N - 34°S, 98°W - 33°W

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

Western Atlantic: Bermuda and North Carolina, USA to Rio de Janeiro, Brazil (Ref. 57756).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm TL male/unsexed; (Ref. 7251); common length : 15.0 cm TL male/unsexed; (Ref. 5217)

Short description Morphology | Morphometrics

Dorsal spines (total): 13; Dorsal soft rays (total): 47-55; Anal spines: 2; Anal soft rays: 16. Very high first dorsal fin with a short base (Ref. 26938). Gray with three white-edged dark brown to black bands, the first running vertically through eye, the second from nape across operculum and chest to front of pelvic fins, and the last beginning on first dorsal fin and running to end of caudal fin (Ref. 13442). Third and widest band from tip of high dorsal fin, curving along length of body to tip of tail (Ref. 26938).

Biology     Glossary (e.g. epibenthic)

Inhabits bays and sounds; also deep coral reefs (Ref. 9710). Juveniles sometimes inshore (Ref. 9710). Easily approached (Ref. 9710). Has been reared in captivity (Ref. 35420). Feeds mainly on small shrimps and crabs, but also on polychaete worms and gastropod mollusks (Ref. 13442).

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

Oviparous (Ref. 240).

Main reference Upload your references | References | Coordinator | Collaborators

Robins, C.R. and G.C. Ray, 1986. A field guide to Atlantic coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 354 p. (Ref. 7251)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

Threat to humans

  Reports of ciguatera poisoning (Ref. 30303)




Human uses

Fisheries: minor commercial; aquarium: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration
Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance
References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Download XML

Internet sources

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 22.7 - 28, mean 25.7 (based on 274 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00708 (0.00414 - 0.01211), b=3.20 (3.06 - 3.34), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic Level (Ref. 69278):  3.4   ±0.4 se; Based on diet studies.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (22 of 100) .
Price category (Ref. 80766):   Medium.