Dusky Grouper
The dusky grouper — garoupa in Brazil — is a reef fish that has shaped artisanal fisheries along the Brazilian coast from Bahia south to Santa Catarina.
Caught mainly by hook-and-line and spearfishing, it's a commercially valued species now listed as threatened by the Brazilian Ministry of the Environment, with active reintroduction programs underway along the southeastern coast.
Scientific Name: Epinephelus marginatus
Also known as Garoupa
- Dark reddish or grayish body on top, fading to a lighter — sometimes yellowish — belly; white or beige spots scattered across the body and head.
- Odd fins are dark brown, typically edged with a white or pale margin; body is thick and robust with a large mouth.
- Most fish caught run 50–80 cm; the species can reach 150 cm and 60 kg, though fish that size are rarely encountered today given fishing pressure.
- Matures first as female, then transitions to male — a biology that makes large individuals almost certainly male and especially important to the population.
What to know
Habitat Distribution
- Native to the southwestern Atlantic; in Brazil, found from the southeastern coast (São Paulo, Rio de Janeiro) north to Bahia, with records extending south toward Uruguay and Argentina.
- A hard-bottom fish — lives on rocky reefs, rocky outcrops, and reef structure; essentially absent over sand.
- Depth range runs from about 8 m down to 300 m, though most fish are found shallower than 50 m, which is where artisanal fisheries and divers encounter them.
- Sedentary by nature — individuals hold territories on specific reef structures rather than roaming widely.
Key Locations
- Southeastern Brazilian coast (São Paulo and Rio de Janeiro states) — the focus of active reintroduction programs and historically important artisanal reef fisheries.
- Paraty region (Rio de Janeiro / São Paulo border) — documented in small-scale fisheries research as a key area for garoupa harvest and study.
- Pantano do Sul, Florianópolis, Santa Catarina — southern limit of documented Brazilian fishery communities targeting this species.
- Porto Sauípe, Bahia — northern extent of documented artisanal fishery communities studied for garoupa catch and local ecological knowledge.
Specific Spots
- Rocky outcrops and reef ledges hold the highest densities; juveniles concentrate on rocky shoreline structure and submerged outcrops, avoiding open sand entirely.
- Caves, crevices, and undercut ledges on reef faces give adults the shelter they prefer — work these features slowly rather than open reef flats.
- Depth transitions where rocky reef meets sand are worth targeting, as fish use the edge as a hunting ground while staying close to cover.
Dusky Grouper FAQ
Answers from onWater's species guide.
What are the best lures and bait for Dusky Grouper?
Live or fresh-cut fish (sardines, small reef fish) and squid are the traditional and most effective baits used by Brazilian artisanal fishermen, fished on the bottom near rocky structure.
When is the best time to fish for Dusky Grouper?
Hook-and-line fishing occurs year-round in artisanal communities, but productivity tends to follow water temperature, warmer months (October through March) generally see fish more active in shallower reef zones.
How do you catch Dusky Grouper?
Along the Brazilian coast, garoupa are targeted almost exclusively by artisanal fishermen working from small boats over rocky reefs, using hook-and-line with live or cut bait fished on the bottom.
What do Dusky Grouper eat?
Feeds primarily on smaller reef fish, crustaceans, and cephalopods (squid and octopus), a sit-and-wait predator that uses reef structure as cover. Live or fresh-cut fish and squid are the go-to baits for artisanal fishermen along the Brazilian coast.
Where do Dusky Grouper live?
Native to the southwestern Atlantic; in Brazil, found from the southeastern coast (São Paulo, Rio de Janeiro) north to Bahia, with records extending south toward Uruguay and Argentina. A hard-bottom fish, lives on rocky reefs, rocky outcrops, and reef structure; essentially absent over sand.
See it in the app
Most maps show you water.
onWater shows you Dusky Grouper.
- 01 · Species map filter
Map every Dusky Grouper water
Pick Dusky Grouper and the map zeroes in on the waters they call home. No more guessing which lake holds them.
- 02 · Waterbody species
Tap any water. See what lives there.
Species, behavior and seasonal patterns for every lake, river and pond, before you leave the driveway.
- 03 · Angler Intelligence
Ask how to catch Dusky Grouper
Tactics, gear and timing from onWater's AI fishing guide, tuned to the species and the water you're on.
Stop guessing where Dusky Grouper are.
Open the map, filter by Dusky Grouper, and head to water that holds them. Download onWater and plan your next trip in minutes.
- Species map filter
- Angler Intelligence
- Fishing journal
Explore other species
Trout, bass, salmon, panfish and everything in between. Each guide unpacks the behavior, seasons, and tactics that put fish in the net.
No species information available.
Smarter Fishing Starts in the App.
onWater Fish gives you everything you need to plan smarter, fish better, and own every trip from first cast to last.