Rainbow Trout
Scientific Name: Oncorhynchus mykiss
UK Status: Introduced / Stocked
Quick Facts
Typical Size: 1–3 lb
Specimen Size: 6–10 lb possible
Best Season: Spring to autumn
Habitat: Rivers, streams, lakes, and stocked fisheries
Identification
Rainbow Trout are streamlined fish with a silvery body and a distinctive pink to red lateral stripe running along each side. They have small black spots on the back, dorsal fin, and tail.
They are similar in shape to brown trout but are distinguished by the vibrant lateral stripe and more uniform spotting.
Habitat & Behaviour
Rainbow Trout prefer clean, well-oxygenated water with moderate flow.
They feed on insects, larvae, small crustaceans, and small fish. In stocked fisheries, they may also feed on pellets and prepared feeds. They are active during daylight, particularly in warmer months.
Best Baits & Methods
Baits / Lures:
Artificial flies (dry, wet, or nymphs)
Spinners or small lures
Worms and maggots in stocked fisheries
Methods:
Fly fishing in rivers and streams
Light spinning in lakes or stillwaters
Float fishing in stocked waters
Tackle Guide
Rod: 7–9 ft light or medium rod
Line: 4–8 lb
Hooks: Size 12–16
Delicate presentation helps increase catches, especially in rivers.
Notes
Rainbow Trout are non-native in the UK and primarily stocked for angling. They are prized for sport and fighting ability, and careful handling improves survival for catch-and-release fishing.