Baitfish · Cottus, Notropis and others
Baitfish and Sculpin
Also called Minnow, Streamer, Sculpin.
Short answer
Baitfish and sculpins are the largest food a trout eats regularly, and the reason streamer fishing exists. Big trout become fish-eaters as they grow, which is why streamers catch fewer fish but larger ones. Best in high or coloured water, in autumn, and at first and last light.
What a baitfish and sculpin is
Once a trout passes roughly sixteen inches, insects stop paying their way and fish become the efficient meal. Sculpins are the most important of them in most trout rivers: bottom-dwelling, big-headed, poor swimmers that live under rocks and get exposed when the flow changes. Alongside them are dace, shiners, juvenile trout and whitefish. Fishing a streamer is a deliberate trade — you will get far fewer takes than nymphing, and the ones you get will average much larger, because you have stopped fishing for the whole population and started fishing for the fish that eat other fish.
- Hook size
- Hook sizes 2 to 10, and larger on big western rivers
- Colour
- Olive, brown, black, white and yellow; dark in coloured water, light in clear
The stages trout eat
- Sculpin
- Bottom-hugging and clumsy. Fished deep and slow along the bank, with pauses.
- Minnow and dace
- Mid-column swimmers. Fished faster, with a more even retrieve.
- Juvenile trout
- Big browns eat their own. A brown-trout-coloured streamer in autumn is not a joke.
- Leech
- Not a fish, but fished the same way and often on the same day. A black woolly bugger covers both.
When does the baitfish and sculpin hatch?
| When | What is happening |
|---|---|
| March – April | High, cold, coloured water. Fish slow and deep, right against the bank. |
| May – August | First and last light, and any day the river comes up or colours after rain. |
| September – November | The best of the year. Pre-spawn browns get aggressive and territorial. |
| Winter | Slow and deep. Few takes, but the takes are from the largest fish in the river. |
Emergence dates move with latitude, altitude and the weather of a given year. Treat these windows as a shape, not a diary, and check a local report before you travel.
Where it matters
Every trout river. The famous streamer fisheries are the big western rivers — Montana's Missouri and Yellowstone, Arkansas's White, Kentucky's Cumberland — but a woolly bugger catches fish in a Pennsylvania limestone creek too.
Fly fishing in Montana Fly fishing in Arkansas Fly fishing in Kentucky Fly fishing in Maine Fly fishing in Alaska
How to fish it
Get it to the bank and get it deep. Most streamer fish come within a few feet of the edge or a structure, and most anglers fish too far out and too fast. Vary the retrieve until something answers, and build in pauses — a huge proportion of takes come on the pause, when the fly drops like a wounded fish. Use heavier tippet than feels necessary; 0X to 3X is normal, and the fish are not inspecting.
- Fish the bank. Most streamer eats happen within a rod length of the edge.
- The pause is the trigger. A fly that never stops gets followed and refused.
- Coloured water is an opportunity, not a problem. It is the best streamer condition there is.
Flies that imitate it
Each of these is a card in the deck, and each has a full page in Our Fly-brary.
Keep reading
- Dry fly vs nymph — which stage to fish, and when
- Why trout refuse your fly — usually the wrong stage, not the wrong pattern
- Best time of day to fly fish — the daily logic behind the table above
- Our Fly-brary — every fly in the deck, explained