RiverFish

Rudd · Scardinius erythrophthalmus

Rudd in the Grantham Canal

Largest measured rudd: 16.7 cm

The largest rudd measured in Environment Agency surveys of the Grantham Canal was 16.7 cm, recorded at Casthorpe Bridge on 23 May 1985.

Across 424 measured rudd, the median measured length was 7.7 cm.

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

See rudd records across England →

Most recent observation18 April 1997Denton Wharf · 64 fish
Largest measured rudd
16.7 cm
Median length
7.7 cm
Fish measured
424
Survey locations
3

Individual EA measurements

Largest measured rudd

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

LengthSurvey dateSurvey locationSurvey ID
16.7 cm23 May 1985Casthorpe Bridge53064
16.4 cm22 May 1985Denton Wharf53066
15.7 cm23 May 1985Casthorpe Bridge53064
15 cm23 May 1985Casthorpe Bridge53064
14.8 cm23 May 1985Casthorpe Bridge53064
14.4 cm23 May 1985Casthorpe Bridge53064
14.3 cm23 May 1985Casthorpe Bridge53064
14 cm20 May 1985Denton Road Bridge53063
13.9 cm22 May 1985Denton Wharf53066
12.9 cm20 May 1985Denton Road Bridge53063

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

Explore the river

Where rudd were found

Each point marks a survey location with at least one rudd 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 rudd
Denton Wharf22 May 198518 Apr 19972
Denton Road Bridge20 May 198517 Apr 19972
Casthorpe Bridge23 May 198516 Apr 19972

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

1985–1997

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 424 measured fish were spread across different length ranges.

Smallest
4 cm
Lower quarter
7.1 cm
Median
7.7 cm
Upper quarter
8.6 cm
Largest
16.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Grantham Canal

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

Pike Perch Roach Tench Common bream

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 →