Grayling
Scientific Name: Thymallus thymallus
UK Status: Native
Quick Facts
Typical Size: 1–2 lb
Specimen Size: 3–4 lb possible
Best Season: Late spring to early autumn
Habitat: Clean, fast-flowing rivers with gravelly beds
Identification
Grayling are slender, silver-grey fish with a tall, sail-like dorsal fin edged in black and red. They have small scales and a pointed head with a slightly upturned mouth.
They can be confused with trout, but grayling have a more upright dorsal fin and a slimmer, more elongated body.
Habitat & Behaviour
Grayling prefer well-oxygenated, fast-flowing rivers with gravel or sandy bottoms. They feed in mid-water or near the surface, mainly on insect larvae, small crustaceans, and terrestrial insects.
They are active during daylight, particularly in warmer months, and often form small shoals.
Best Baits & Methods
Baits / Lures:
Small maggots or worms
Nymphs and small flies
Tiny spinners or lures
Methods:
Float fishing in rivers
Fly fishing with small dry or wet flies
Light ledgering near riffles
Tackle Guide
Rod: Light river rod (7–10 ft)
Line: 2–6 lb depending on water conditions
Hooks: Size 14–18
Delicate tackle and careful presentation are key for success.
Notes
Grayling are highly prized for their beauty and sport. They are sensitive to pollution, so their presence is often a sign of healthy rivers. Some rivers operate catch-and-release policies to protect populations.