RiverFish

Perch · Perca fluviatilis

Perch in the Grand Union Canal

Largest measured perch: 38.3 cm

The largest perch measured in Environment Agency surveys of the Grand Union Canal was 38.3 cm, recorded at Grafton Regis on 3 April 1990.

Across 5,093 measured perch, the median measured length was 8.3 cm.

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

See perch records across England →

Most recent observation1 February 1994Cosgrove · 44 fish
Largest measured perch
38.3 cm
Median length
8.3 cm
Fish measured
5,093
Survey locations
16

Individual EA measurements

Largest measured perch

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

LengthSurvey dateSurvey locationSurvey ID
38.3 cm3 Apr 1990Grafton Regis28795
36.3 cm13 Mar 1990Ivinghoe Lock28782
34.3 cm20 Dec 1993Bradwell Waste Tip28807
33.8 cm15 Mar 1990Leighton Buzzard Canal28784
33.3 cm13 Mar 1990Ivinghoe Lock28782
32.8 cm23 Mar 1990Stoke Bruerne28796
32.3 cm13 Mar 1990Ivinghoe Lock28782
31.8 cm1 Feb 1994Cosgrove28809
31.3 cm24 Nov 1993Ivinghoe Lock28797
30.8 cm14 Dec 1993Water Eaton28803

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 perch
Cosgrove4 Apr 19901 Feb 19942
Stoke Bruerne23 Mar 199031 Jan 19942
Grafton Regis3 Apr 199028 Jan 19942
Yardley Gobion GUC2 Apr 199023 Dec 19932
Wolverton28 Mar 199022 Dec 19932
Bradwell Waste Tip27 Mar 199020 Dec 19932
Linford Manor Park25 Mar 199017 Dec 19932
Woolstone30 Mar 199016 Dec 19932
Simpson22 Mar 199015 Dec 19932
Water Eaton21 Mar 199014 Dec 19932
Three Locks19 Mar 199013 Dec 19932
Old Linslade7 Dec 19937 Dec 19931
Grove Lock14 Mar 19902 Dec 19932
Stoke Hammond20 Mar 199030 Nov 19932
Leighton Buzzard Canal15 Mar 199029 Nov 19932
Ivinghoe Lock13 Mar 199024 Nov 19932

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

1990–1994

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 5,093 measured fish were spread across different length ranges.

Smallest
4.8 cm
Lower quarter
6.8 cm
Median
8.3 cm
Upper quarter
9.3 cm
Largest
38.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Grand Union Canal

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

Common bream Gudgeon Roach Ruffe Pike Bullhead

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 →