Atlantic Halibut
The largest flatfish in the world, Atlantic halibut patrol the cold, deep waters of the North Atlantic from the eastern seaboard of North America across to Iceland, Norway, and the Barents Sea.
Adults can exceed 300 pounds and live past 50 years, making every encounter with a large fish a rare thing. Sport fishing for them is concentrated in northern European waters, where populations remain more viable.
Scientific Name: Hippoglossus hippoglossus
- Both eyes sit on the right side of the head — the defining trait of a right-eyed flounder — with a large, gaping mouth and a distinctly concave tail fin that separates it from other large flatfish.
- Upper surface runs uniformly dark chocolate, olive, or near-black; the underside is white. Younger fish tend to be paler and more mottled before darkening with age.
- The arched lateral line curving sharply above the pectoral fin is a reliable field mark that distinguishes Atlantic halibut from similar species.
- Full-grown females average 100–150 lbs; males run smaller. Fish exceeding 300 lbs have been recorded, and the largest documented specimen weighed over 600 lbs eviscerated.
What to know
Habitat Distribution
- A cold-water species native to the North Atlantic — ranging from Labrador and Greenland west to the eastern seaboard of North America, and east to Iceland, the British Isles, Norway, and the Barents Sea, as far south as the Bay of Biscay.
- Spends most of its life on or near the seafloor at depths of 50 to 2,000 meters, preferring sand, gravel, or clay substrates — not soft mud or hard rock.
- Northwest Atlantic populations, particularly in the Gulf of Maine and Georges Bank, are severely depleted from historical levels. Northern European waters — especially Norway and Iceland — hold the most accessible sport fisheries today.
Specific Spots
- Holds tight to the bottom on hard, flat substrates — sand and gravel shelves and offshore banks where baitfish and bottom-dwelling prey concentrate.
- During spawning, moves into comparatively shallower water (50–200 m), which is when fish are most accessible to sport anglers targeting them from boats.
- Deep-water edges and current-swept bottom structure are productive because they funnel prey past a fish that waits and intercepts rather than chases.
Atlantic Halibut FAQ
Answers from onWater's species guide.
What are the best lures and bait for Atlantic Halibut?
Large shad-style soft-plastic jigs on heavy jig heads (4–10 oz or more depending on depth) worked slowly along the bottom are the go-to across most of the European sport fishery, the action mimics a wounded baitfish and keeps the presentation in the strike zone.
What do Atlantic Halibut eat?
Smaller halibut (under about 12 inches) feed mainly on invertebrates, crustaceans and bottom-dwelling animals. As they grow past roughly 30 inches, fish make up the bulk of the diet: cod, haddock, herring, capelin, and sand eels are primary targets, along with squid and octopus.
Where do Atlantic Halibut live?
A cold-water species native to the North Atlantic, ranging from Labrador and Greenland west to the eastern seaboard of North America, and east to Iceland, the British Isles, Norway, and the Barents Sea, as far south as the Bay of Biscay.
See it in the app
Most maps show you water.
onWater shows you Atlantic Halibut.
- 01 · Species map filter
Map every Atlantic Halibut water
Pick Atlantic Halibut 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 Atlantic Halibut
Tactics, gear and timing from onWater's AI fishing guide, tuned to the species and the water you're on.
Stop guessing where Atlantic Halibut are.
Open the map, filter by Atlantic Halibut, 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.