| Common names: jack (English), hojarán (Espanol), medregal (Espanol) |
Seriola peruana Steindachner, 1881
Elongate, fusiform, compressed; upper body profile more convex than lower profile; snout short, rounded; mouth ends just behind center of pupil, supramaxilla bone above top jawbone moderately wide; gill rakers (excluding rudiments) 30-34; dorsal fin with VII-VIII spines (front spines may be imbedded in very large fish), then a notch before I, 31-35; anal fin II isolated spines (reduced or embedded in large fish) + I, 20-22, its base much shorter than soft dorsal base; pectoral short (< head length); no isolated finlets after dorsal and anal fins; tail base with grooves on dorsal and ventral surface of tail fin base, but no lateral fleshy keel; lateral line with slight arch over pectoral region; no scutes (hard spiny scales) on lateral line.
Olivaceous to bluish on back, sides silvery to slightly bronzy; fins somewhat dusky; no bars or stripe on head or body. Juvenile: membranes of 2nd dorsal and anal fins dark.
Size: reaches at least 92 cm, common to 40 cm.
Habitat: coastal pelagic and demersal.
Depth: 0-30 m.
The SW Gulf of California to Chile, including the Galapagos and Malpelo.
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic
Regional Endemism: All species, TEP endemic, Continent + Island (s), Continent, Island (s)
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos), Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo), South Temperate (Peruvian Province )
Inshore/Offshore: Inshore, Inshore Only
Water Column Position: Near Surface, Mid Water, Near Bottom, Bottom, Bottom + water column
Habitat: Reef (rock &/or coral), Rocks, Reef associated (reef + edges-water column & soft bottom), Water column
FishBase Habitat: Bentho-Pelagic
Habitat and Ecology
Water temperature and chemistry ranges based on 1 sample.
Depth range (m): 3.5 - 132
Temperature range (°C): 14.235 - 14.235
Nitrate (umol/L): 31.396 - 31.396
Salinity (PPS): 34.888 - 34.888
Oxygen (ml/l): 0.376 - 0.376
Phosphate (umol/l): 2.256 - 2.256
Silicate (umol/l): 23.940 - 23.940
Depth range (m): 3.5 - 132
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Diet: mobile benthic crustacea (shrimps/crabs), octopus/squid/cuttlefish, bony fishes
Diseases and Parasites
Life History and Behavior
CITES: Not listed
IUCN Red List Assessment
Red List Category
Red List Criteria
This species is caught in artisanal fisheries.
Relevance to Humans and Ecosystems