Peruvian Grunt
The Peruvian grunt reaches its southern limit along Chile's northern coast, around Antofagasta, where it lives on rocky inshore reefs. It's primarily a target of artisanal coastal fishermen in the region rather than a recreational sport fishery.
Its white, high-yield flesh makes it commercially valuable, and it's caught alongside other reef species in the Humboldt Current zone.
Scientific Name: Anisotremus scapularis
Also known as Sargo, Burro
- Deep, compressed body with a noticeably high back and small, blunt head; a distinct depression sits just in front of the eye.
- Dark charcoal-grey to brownish on the upper half, white below, with a silvery-white streak along the lateral line that fades quickly after the fish dies.
- Thick lips, small low mouth, and a forked tail; the dorsal and anal fins taper to a roughly triangular outline with taller anterior rays.
- Grows to around 40–58 cm; typical fish run considerably smaller, with a recorded maximum weight near 900 g.
What to know
Habitat Distribution
- Native to the southeastern Pacific; in Chile its range extends along the northern coast to around Antofagasta, the species' southern boundary.
- Lives on rocky, boulder-strewn inshore reefs and hard substrate with good water movement, generally between 3 and 30 m, most commonly shallower than 12 m.
- A strictly marine, inshore species — it does not enter estuaries or fresh water.
Key Locations
- Antofagasta region — the southernmost extent of the species' range along Chile's northern Pacific coast, where rocky reef habitat is present.
Specific Spots
- Rocky reef edges and boulder fields where current pushes over hard substrate — the fish school in open water just above the bottom in these zones.
- Shallower sections of reef (3–12 m) tend to concentrate the most fish; deeper structure down to 30 m holds them when surface conditions are rough.
- Any hard substrate with strong water movement along the northern Chilean coast is worth working — the species gravitates to current-swept rock rather than calm sandy bottom.
Peruvian Grunt FAQ
Answers from onWater's species guide.
What are the best lures and bait for Peruvian Grunt?
Cut bait and whole small crustaceans fished on a bottom rig are the traditional approach for artisanal fishermen targeting this species on rocky reefs. Small jigs and soft-plastic shrimp or crab imitations worked slowly along the bottom near boulder structure also match the fish's invertebrate-focused diet.
When is the best time to fish for Peruvian Grunt?
Spawning activity peaks from summer into autumn (roughly December through April in the southern hemisphere), which may concentrate fish on shallower reef structure.
How do you catch Peruvian Grunt?
Along Chile's northern coast, this fish is taken primarily by artisanal fishermen working rocky inshore reefs from small boats, using bottom rigs with cut bait or crustaceans fished close to boulder structure in 3–12 m of water.
What do Peruvian Grunt eat?
Feeds on benthic invertebrates, crabs, shrimp, sea urchins, and similar bottom-dwelling creatures, as well as floating organic matter; small jigs, soft-plastic crustacean imitations, and cut bait fished near the bottom cover the main forage categories.
Where do Peruvian Grunt live?
Native to the southeastern Pacific; in Chile its range extends along the northern coast to around Antofagasta, the species' southern boundary. Lives on rocky, boulder-strewn inshore reefs and hard substrate with good water movement, generally between 3 and 30 m, most commonly shallower than 12 m.
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