RiverFish

Roach · Rutilus rutilus

Roach in the River Nar

Largest measured roach: 33.3 cm

The largest roach measured in Environment Agency surveys of the River Nar was 33.3 cm, recorded at US Sluice Kings Lynn on 12 January 1990.

Across 9,798 measured roach, the median measured length was 13.3 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Nar.

See roach records across England →

Most recent observation3 March 2026West Lexham · 2 fish
Largest measured roach
33.3 cm
Median length
13.3 cm
Fish measured
9,798
Survey locations
14

Individual EA measurements

Largest measured roach

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
33.3 cm12 Jan 1990US Sluice Kings Lynn30337
31.8 cm12 Jan 1990US Sluice Kings Lynn30337
31.3 cm12 Jan 1990US Sluice Kings Lynn30337
30.8 cm25 Mar 1993Setchey30347
30.8 cm12 Jan 1990US Sluice Kings Lynn30337
30.8 cm12 Jan 1990US Sluice Kings Lynn30337
30.3 cm12 Jan 1990US Sluice Kings Lynn30337
30.3 cm12 Jan 1990US Sluice Kings Lynn30337
29.8 cm12 Jan 1990US Sluice Kings Lynn30337
29.3 cm30 Mar 1993High Bridge Side Channel30346

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding roach
West Lexham8 Mar 20233 Mar 20263
DS Narborough Mill20 Mar 20191 Apr 20252
Castle Acre5 Mar 20195 Mar 20191
Abbey Farm16 Mar 201520 Mar 20172
DS Marham Sluice14 Mar 201714 Mar 20171
Narford Hall Estate21 Mar 201217 Mar 20162
White House Farm Kings Lynn1 Apr 20151 Apr 20151
Setchey11 Jan 199017 Mar 20154
Wormegay High Bridge30 Mar 199312 Mar 20153
High Bridge Side Channel17 Nov 198912 Mar 20155
Saddlebow18 Jan 199019 Apr 20104
US Sluice Kings Lynn12 Jan 199015 Apr 20105
Marham Intake25 Jan 199612 Apr 20102
Nar Valley Fishery3 Apr 19963 Apr 19961

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1989–2026

Survey records by year

Each bar shows how many survey visits recorded roach that year.

Fish measured by surveyors

Measured length distribution

See how the 9,798 measured fish were spread across different length ranges.

Smallest
3.3 cm
Lower quarter
12.3 cm
Median
13.3 cm
Upper quarter
14.3 cm
Largest
33.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nar

Compare other species with enough survey and measurement data for a detailed page.

European eel Bullhead 3-spined stickleback Brown / sea trout Pike Dace

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →