Caddisflies
Gammarids
The Sée runs off the Armorican granite into the Baie du Mont-Saint-Michel and is one of the last few Normandy rivers where wild Atlantic salmon still return in meaningful numbers. The run is small by Scottish standards — a few hundred fish a year in good seasons — but it is genuine and unsupported by stocking. Salmon fishing is closed throughout the Seine-Normandie basin under the 2026–27 basin order. The fishable water runs from Avranches upstream through Saint-Hilaire-du-Harcouët to the headwaters above Sourdeval. Sea trout numbers are now negligible and should not be relied on. The trout fishing in the upper reaches is honest rather than remarkable — wild fish, granite pools, good Baetis and stonefly hatches — and it is what the river is for at present.
On Atlantic trout rivers in Normandy and Brittany, regional studies and on-the-bank experience point to spring mayflies as the main early driver, a strong band of spring and early-summer caddis as channels warm and open, background buzzer life ticking away right through the year, and terrestrials from wooded banks adding important surface food in summer and early autumn, with autumn olives extending sport wherever trout-season rules allow.
- Granite