Grayling
Thymallus thymallus · Fresh
Sail-finned fish of clean cool rivers, best fished in autumn and winter.

Photo: Zsoldos Márton, CC BY-SA 3.0, Wikimedia Commons
Facts
| Best months | JFMAMJJASOND Jun–Nov. Northern hemisphere; shift by six months south of the equator. |
|---|---|
| Feeds | Daytime |
| Water temp | 8–16 °C |
| Typical size | 25–35 cm · record about 60 cm |
| Diet | Insects, crustaceans |
| Regions | Europe |
How conditions affect it
Moon
Not very moon-driven.
Tide
Tide matters little for this species.
Pressure
Sensitive to pressure: fish a steady or slowly falling barometer.
Catching tip. Small nymphs or dry flies in clear streams in autumn.
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