Blue Runner
Blue runners reach the northern edge of their western Atlantic range along Canada's Atlantic coast, with documented catches off the south coast of Newfoundland.
They're not a target species here the way they are farther south — their appearance in Canadian waters is occasional and tied to warm-season incursions.
When they do show up, they're a schooling jack that hits readily and punches well above its weight class on light tackle.
Scientific Name: Caranx crysos
Also known as Bluestripe jack, hardtail jack, hardtail, hardnose, green jack
- Elongated, compressed body with a blue-green back fading to a silvery-white belly; forked tail with dark-tipped lobes and a black spot on the gill cover.
- Prominent lateral line, slightly protruding lower jaw, and two-part dorsal fin — the first section spiny, the second soft-rayed — give it a classic jack silhouette.
- Common in Canadian waters at under 35 cm; maximum recorded size is 70 cm and just over 5 kg, though fish that large are rare anywhere in the range.
What to know
Habitat Distribution
- At the northern limit of its western Atlantic range — FishBase lists Nova Scotia as the northernmost extent, and 21 specimens were documented off the south coast of Newfoundland in 2014, the first confirmed Canadian records.
- A warm-water, reef-associated species that moves into Canadian waters during summer when sea surface temperatures rise; not a year-round resident.
- Found from the surface down to about 100 m, using both inshore environments — harbours, piers, shallow reefs — and offshore structure.
Key Locations
- South coast of Newfoundland — the only location with formally documented Canadian records, from commercial fishermen's catches in 2014.
- Nova Scotia shelf waters — listed as the northern extent of the western Atlantic range; warm-season incursions possible along the Atlantic-facing coast.
Specific Spots
- Schools push into inshore areas around piers, fish docks, and harbour structure when chasing baitfish — look for diving seabirds marking the action from above.
- Offshore, blue runners congregate around hard bottom, reefs, and large man-made structures; in Canadian waters that means the shelf edge and any fixed gear or anchored vessels.
- Juveniles hold shallower — lagoon edges and sheltered bays — while larger adults tend to run deeper over structure.
Blue Runner FAQ
Answers from onWater's species guide.
What are the best lures and bait for Blue Runner?
Small metal jigs (1/4 to 3/4 oz) worked with a fast, erratic retrieve are the go-to, they imitate fleeing baitfish and get down quickly when fish are holding just below the surface churn.
What flies work for Blue Runner?
Clouser Minnows (a weighted, bead-chain-eyed streamer that imitates a small baitfish) in white, chartreuse, or blue-over-white are the standard choice, cast into the school and strip fast with short, sharp pulls.
When is the best time to fish for Blue Runner?
Summer (July–September) is the window when blue runners are most likely to appear in Canadian Atlantic waters, tied to peak sea surface temperatures. No established winter or spring fishery exists in Canada, the species retreats south as water cools in fall.
How do you catch Blue Runner?
Blue runners in Canadian waters are caught incidentally rather than targeted, commercial fishermen off Newfoundland have taken them in nets, and light-tackle anglers fishing piers or inshore structure during summer may encounter schooling fish.
What do Blue Runner eat?
Small baitfish are the main forage in inshore environments, match them with small metal jigs, slim minnow plugs, or Clouser Minnows (a weighted streamer that imitates a baitfish) in the 2–4 inch range.
See it in the app
Most maps show you water.
onWater shows you Blue Runner.
- 01 · Species map filter
Map every Blue Runner water
Pick Blue Runner 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 Blue Runner
Tactics, gear and timing from onWater's AI fishing guide, tuned to the species and the water you're on.
Stop guessing where Blue Runner are.
Open the map, filter by Blue Runner, 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.