RiverFish

Perch · Perca fluviatilis

Perch in the Boulters Weir Stream

Largest measured perch: 17.9 cm

The largest perch measured in Environment Agency surveys of the Boulters Weir Stream was 17.9 cm, recorded at Boulters Weir Downstream Fry on 31 August 2006.

Across 273 measured perch, the median measured length was 5.7 cm.

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

See perch records across England →

Most recent observation4 September 2025Boulters Weir Upstream Fry · 4 fish
Largest measured perch
17.9 cm
Median length
5.7 cm
Fish measured
273
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.

LengthSurvey dateSurvey locationSurvey ID
17.9 cm31 Aug 2006Boulters Weir Downstream Fry111832
16.9 cm31 Aug 2006Boulters Weir Downstream Fry111832
14.2 cm31 Aug 2006Boulters Weir Upstream Fry111831
13.7 cm4 Sept 2025Boulters Weir Upstream Fry178509
13.5 cm18 Aug 2015Boulters Weir Upstream Fry146044
12.6 cm26 Aug 2003Boulters Weir Upstream Fry116939
12.5 cm31 Aug 2006Boulters Weir Downstream Fry111832
11.7 cm26 Aug 2003Boulters Weir Upstream Fry116939
11.5 cm31 Aug 2006Boulters Weir Downstream Fry111832
11 cm31 Aug 2006Boulters Weir Downstream Fry111832

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
Boulters Weir Upstream Fry26 Aug 20034 Sept 20258
Boulters Weir Downstream Fry26 Aug 20034 Sept 20258

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

2003–2025

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 273 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
5.1 cm
Median
5.7 cm
Upper quarter
6.7 cm
Largest
17.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Boulters Weir Stream

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

Minnow Dace Roach Bleak Chub Gudgeon

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 →