Perch · Perca fluviatilis

Perch in the River Cooks Backwater

Largest measured perch: 23.8 cm

The largest perch measured in Environment Agency surveys of the River Cooks Backwater was 23.8 cm, recorded at Godmanchester on 18 August 1992.

Across 90 measured perch, the median measured length was 7.5 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 Cooks Backwater.

See perch records across England →

Most recent observation28 September 1998Hartford Church · 7 fish

Largest measured perch: 23.8 cm
Median length: 7.5 cm
Fish measured: 90
Survey locations: 2

Individual EA measurements

Largest measured perch

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

Length	Survey date	Survey location	Survey ID
23.8 cm	18 Aug 1992	Godmanchester	29091
19.3 cm	18 Aug 1992	Hartford Church	29092
17.8 cm	14 Jul 1995	Godmanchester	29093
17.3 cm	27 Oct 1989	Godmanchester	29089
16.3 cm	27 Oct 1989	Godmanchester	29089
16.3 cm	27 Oct 1989	Godmanchester	29089
15.8 cm	18 Aug 1992	Hartford Church	29092
15.8 cm	27 Oct 1989	Godmanchester	29089
15.3 cm	14 Jul 1995	Godmanchester	29093
15.3 cm	27 Oct 1989	Godmanchester	29089

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 surveyed	First recorded	Last recorded	Visits finding perch
Hartford Church	26 Oct 1989	28 Sept 1998	3
Godmanchester	27 Oct 1989	18 Sept 1998	4

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

1989–1998

Survey records by year

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

289

090

091

292

093

094

195

096

097

298

Fish measured by surveyors

Measured length distribution

See how the 90 measured fish were spread across different length ranges.

Smallest: 4.8 cm
Lower quarter: 5.9 cm
Median: 7.6 cm
Upper quarter: 12.3 cm
Largest: 23.8 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cooks Backwater

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

Roach Pike

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 →