Sculpin (North America)

This is a fall pattern, not a year-round one — not because the sculpin goes anywhere (it doesn't; it lives its whole life wedged under the same gravel and rubble) but because that's when trout stop ignoring it. As insect life thins out through September and October and the water cools, brown trout — heading into their own fall spawn and feeding aggressively ahead of it — switch onto sculpin harder than onto anything else available. One Utah study on the Logan River found sculpin made up around 81% of brown trout diet by weight in that window, and a big fish over 260mm can get through more than thirty of them in a year. Fish a Sculpin Streamer, Woolly Bugger or Muddler Minnow deep and slow along the bottom, working it through the same broken riffle and rubble water the fish itself lives in — low light tends to fish it better still, since this is an ambush predator meeting another one.

• North America — WestPresent
• North America — EastPresent

The mottled sculpin (Cottus bairdii) is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. Its colouring features bars, spots and speckles randomly distributed, with banded pectoral fins, and it reaches a maximum length of about 15cm. It inhabits well-oxygenated and clear water, such as over gravel riffles in mountain streams, springs, and along rocky lake shores, across a scattered North American range from the Tennessee River north to Labrador, with additional populations in the Missouri River, Columbia River system and Great Basin.