Photo: Naturalist Observation, c. 1912.
Species

Kokanee

The landlocked, freshwater-resident form of sockeye salmon (Oncorhynchus nerka) — silver fish that live their whole lives in cold lakes and turn brilliant red to spawn. Native to lakes across western North America, including British Columbia and the Yukon, and widely stocked elsewhere. A prized light-tackle sport fish and, just as important, the keystone forage that grows big trout and char — on kootenay lake it feeds the giant Gerrards and bull trout.

Key points

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Life history: landlocked sockeye; plankton feeders that mature at two to four years, spawn once in tributaries or on lake shoals, then die.
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Range: native to lakes across western North America — BC, the Yukon, and the western U.S. — and stocked into many more (source).
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As forage: the base of many trophy predator fisheries; where kokanee crash, the predators above them follow.
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In the Kootenays: dam-driven oligotrophication collapsed Kootenay Lake kokanee, triggering the long-running Nutrient Restoration Program, spawning-channel work at meadow creek, and a predator Angling Incentive Program — the full story is in Kokanee Fishing in the Kootenays.

Seasonal pattern

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Early spring: kokanee roam the whole lake in cold water and push into the shallows for chironomid and mayfly hatches. Unlike rainbows, which hold near bottom, kokanee take chironomids at any depth — as little as a metre down over deep water Ramsay/FFSBC.
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The shallow window is brief. Kokanee don't tolerate warm water: rainbows keep feeding on hatches as the lake warms, kokanee abandon the shallows Ramsay/FFSBC.
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Late spring (May–June): back over deep water, feeding all day with dawn/dusk peaks — the highest-success period of the year Ramsay/FFSBC.
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Summer: a thermocline sets up (usually June; typically 6–9 m / 20–30 ft on kokanee lakes) and schools tighten just below it. Kokanee turn crepuscular — the "one for three" rule: dawn/dusk bites drop to a third at midday Ramsay/FFSBC.
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Late summer (by early August): deepest fish of the year, in small schools or singles, but the biggest. Near-mature kokanee stop feeding and strike out of aggression — speed up and add action Ramsay/FFSBC.
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Spawning-year fish feed hard — kokanee can double in size spring to fall in their final year, and a deep-water chironomid hatch still pulls them (source).

On the fly

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The spring chironomid window is the prime shot. Fish chironomid under indicator exactly as for rainbows, but shallower — hang a chironomid or bloodworm as little as a metre down Ramsay/FFSBC. Bright beats natural: pink, silver and chartreuse patterns out-produce (source).
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Set up like they're spooky, because they are. Kokanee are extremely timid in shallow water — double-anchor off the ledges and cast onto the shoal, with the smallest indicator you can get away with. Takes are subtle (the indicator twitches rather than sinks); keep slack out and set with one swift sweep, not a hard strike (source).
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Wind is the locator. Zooplankton and chironomid pupae get pushed to the wind-blown end of the lake — target wind-blown points and shoals, current seams and narrows (source, source).
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Troll the fly once they're deep. Fast-sinking line under 1 mph — kokanee want 0.8–1.8 mph, slower than trout speeds — with a small bright pattern (Doc Spratley is the classic), pumping the rod every ~10 seconds for a stop-and-go, erratic action (source, source). Once the trolled fly finds a school, anchor and switch to a small chironomid, bloodworm or shrimp pattern (source).
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Gentle hands. Kokanee mouths are extremely soft and hooked fish jump and run hard — a limber 8' 5-wt loses fewer of them. BC kokanee average 1–1.5 lb; some waters give up 3 lb+ (source).
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The mainstream method is gear, not fly: an attractor (gang troll, mini-flasher or dodger) trailing a small lure sweetened with bait, weighted or downrigged to depth Askey/FFSBC.

Fishing by region

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Retention limits and closures vary sharply by lake and are tightest where kokanee are recovering — in the Kootenays, see Kokanee Fishing in the Kootenays.

Forage role

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As prey, kokanee (esp. fry) are the keystone baitfish here — see baitfish and fry; as feeders, they live on zooplankton.

Videos

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Fly Fishing for KOKANEE in Connecticut — on-water kokanee-on-fly footage.
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Why is this Kokanee Tube fly so effective? — kokanee-specific pattern and how to fish it.
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Georgetown Lake Kokanee & Trout — fall kokanee on the fly, Montana.
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Chironomid Fly Fishing Strategies (GoFishBC) — the BC technique that takes spring kokanee; no dedicated BC kokanee-on-the-fly video found yet #open.

Related

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kootenay lake — home water.
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gerrard rainbow trout — predator that depends on them.
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chironomid under indicator — the core fly technique for the spring window.
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chironomids — what pulls them into the shallows.

Sources

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Gov data sources — collapse and nutrient-restoration figures.
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ACAT Meadow Creek Spawning Channel F24 report — 2023 spawner/fry/egg-deposition and fish-health figures.
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Go Fish BC — Mastering Kokanee Fishing (Mike Ramsay) — season-by-season depth/behaviour, thermocline, crepuscular pattern, late-summer aggression.
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Go Fish BC — Hot Kokanee Fisheries (Paul Askey) — standard gear-trolling rig; West Arm conveyor-belt current.
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BC Fishn — Kokanee on the Fly (Danny Coyne) — indicator setup, trolled-fly tactic, patterns, rod choice, soft-mouth handling.
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Sea-Run — The Basics of Kokanee Fishing (Danny Coyne) — trolling speeds, erratic-action tactics, locating fish.
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Wikipedia — Sockeye salmon (kokanee) — landlocked form and North American range.
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