What you're looking at
The roach (Rutilus rutilus) is the UK's most-caught freshwater fish — a small, silver, abundant cyprinid that's the bread and butter of float fishing and a specimen target in its own right at the 2 lb / 0.9 kg mark.
Key features
- Body: Compact, deep-bodied, laterally compressed but not as deep as a bream.
- Scales: Bright silver, large, neatly aligned. Often a faint blue-grey sheen on the back.
- Eye: Bright red — the most reliable single ID feature.
- Mouth: Terminal (forward-pointing), small.
- Fins: Pelvic and anal fins reddish-orange; dorsal and tail darker, often grey-red.
- Dorsal fin: Originates directly above the pelvic fin base — a key separator from rudd.
- Size: Most fish 25–250 g. A pound roach is a target fish; 2 lb is specimen.
Confusion species
- Rudd: Brassier gold body, upturned mouth, dorsal fin set well behind the pelvic origin, fins more orange.
- Dace: Slimmer body, eyes pale yellow, dorsal and anal fins concave (not convex). Prefers running water.
- Roach × bream hybrids: Deeper bodied, larger anal fin, intermediate scale count. Very common — assume any "odd-looking" roach is a hybrid.
Where to find them
Roach are in almost every river, canal and stillwater. They shoal mid-water in open swims, near reed margins and over gravel. Will feed all year — winter roach fishing in clearer water is a UK classic.