Caranx hippos

Caranx hippos
Name	Horse-eye jack
Status	LC
Status system	IUCN3.1
Regnum	Animalia
Phylum	Chordata
Classis	Actinopterygii
Ordo	Carangiformes
Familia	Carangidae
Genus	Caranx
Species	C. hippos
Binomial	Caranx hippos
Binomial authority	(Linnaeus, 1766)

Caranx hippos is a large marine fish of the family Carangidae known commonly as the horse-eye jack. It is a reef-associated predatory species found in subtropical and tropical waters of the Atlantic Ocean, notable to anglers, ichthyologists, and fisheries managers. The species features in regional fisheries, aquarium exhibits, and ecological studies of reef and pelagic interactions.

Taxonomy and nomenclature

Caranx hippos was described in the 18th century during the era of Carl Linnaeus and later treatments appear in works associated with Georges Cuvier and Peter Forsskål. The species is placed in the genus Caranx within the family Carangidae, a lineage treated by taxonomists who have also revised related genera such as Trachurus, Seriola, and Pseudocaranx. Nomenclatural history includes synonyms and redescriptions appearing in catalogs curated by institutions like the Smithsonian Institution and the Natural History Museum, London. Regional checklists produced by organizations such as the Food and Agriculture Organization and the American Fisheries Society inform common names used in publications from Florida, Brazil, and the Canary Islands.

Description

Caranx hippos is characterized by a deep, compressed body, a strongly forked caudal fin, and a large eye set beneath a blunt forehead, features compared in morphological keys used by researchers at the Field Museum and the Scripps Institution of Oceanography. Standard length to depth ratios, lateral line scale counts, and gill raker counts are diagnostic in guides from the British Museum and the Marine Biological Association of the United Kingdom. Coloration is typically metallic blue-green dorsally with silvery flanks; juveniles show darker blotches described in monographs from the University of Miami and the Florida Museum of Natural History. Maximum recorded sizes and weights are reported in angling records maintained by the International Game Fish Association and regional sportfishing clubs in Cabo Verde and Bahamas.

Distribution and habitat

The species inhabits the western and eastern Atlantic, with distributional records documented by expeditions from the HMS Challenger era and contemporary surveys by institutions such as the Woods Hole Oceanographic Institution and the CSIC. It occurs from temperate shelves off New England and Portugal to tropical coasts of Brazil, Gulf of Mexico, and the Mediterranean Sea where vagrant occurrences have been noted in reports compiled by the International Council for the Exploration of the Sea. Habitat affinities include coral reefs, rocky bottoms, estuarine inlets, and open pelagic zones, with juveniles frequenting mangrove fringes recorded in studies by the Inter-American Tropical Tuna Commission and the University of Puerto Rico.

Biology and ecology

Caranx hippos is an opportunistic carnivore preying on small fishes and cephalopods; diet composition has been quantified in stomach-content analyses performed by researchers affiliated with the NOAA and the University of South Florida. Reproductive biology—including spawning seasons and fecundity—has been investigated in regional programs led by the Gulf and Caribbean Fisheries Institute and the Government of Bermuda fisheries division. The species participates in reef and pelagic trophic webs studied in ecological syntheses by the Monterey Bay Aquarium Research Institute and the European Marine Biological Resource Centre, interacting with predators and competitors documented in surveys by the Reef Environmental Education Foundation and the Caribbean Fisheries Management Council. Parasite records, including trematodes and copepods, appear in checklists maintained by the Natural History Museum, Paris and university pathology departments.

Fisheries and human interactions

Caranx hippos is targeted and retained in commercial and recreational fisheries; catch data are compiled by the FAO and reported in national statistics from agencies such as the National Oceanic and Atmospheric Administration and the Fisheries and Oceans Canada. The species is sought by sport anglers in locations promoted by tourism authorities in Florida Keys, Cancún, and Madeira, and it features in bycatch records from trawl and seine fisheries monitored by the European Commission and regional management bodies like the Gulf of Mexico Fishery Management Council. Its flesh is marketed fresh and salted in markets studied by economists at the University of Havana and processors regulated by the United States Department of Agriculture in export contexts.

Conservation status

Caranx hippos is assessed by the International Union for Conservation of Nature and listed with a conservation status reflecting population trends influenced by fishing pressure, habitat modification, and climate-driven range shifts documented in reports from the Intergovernmental Panel on Climate Change and regional fisheries assessments by the Organisation for Economic Co-operation and Development. Management measures, including size limits, catch quotas, and protected-area designations, are enacted by authorities such as the NOAA Fisheries and the European Commission to mitigate overexploitation. Ongoing monitoring and stock assessment efforts are conducted by collaborative networks involving the Gulf and Caribbean Fisheries Institute and academic partners at institutions like the University of Miami Rosenstiel School of Marine and Atmospheric Science.

Category:Carangidae Category:Fish of the Atlantic Ocean