RiverFish

Perch · Perca fluviatilis

Perch in the River Swale

Largest measured perch: 37.5 cm

The largest perch measured in Environment Agency surveys of the River Swale was 37.5 cm, recorded at Thornton Bridge on 20 July 2005.

Across 101 measured perch, the median measured length was 14.6 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 Swale.

See perch records across England →

Most recent observation7 August 2025Skipton-on-Swale · 1 fish
Largest measured perch
37.5 cm
Median length
14.6 cm
Fish measured
101
Survey locations
12

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
37.5 cm20 Jul 2005Thornton Bridge86935
37.3 cm31 Jul 2006Myton Grange101065
37 cm24 Jul 2025Myton Grange177532
36.3 cm3 Jul 2013Myton Grange136983
36 cm24 Jul 2002Leckby55270
35.8 cm15 Jul 2019Myton Grange154824
35.7 cm1 Aug 1996Brafferton110454
33.8 cm8 Sept 2004Myton Grange82074
31.2 cm2 Aug 2007Brafferton106466
30.9 cm1 Aug 1996Brafferton110454

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
Skipton-on-Swale13 Aug 20037 Aug 20253
Myton Grange15 Aug 200224 Jul 20259
Brafferton10 Aug 199522 Jul 202413
Langton Bridge8 Aug 200331 Jul 20072
Morton-on-Swale9 Aug 20069 Aug 20061
Fawdington23 Jul 200221 Jul 20052
Thornton Bridge20 Jul 200520 Jul 20051
u/s Topcliffe Weir (Gill Net)12 Aug 200312 Aug 20031
Brompton-on-Swale, Thornborough Farm7 Aug 20037 Aug 20031
Leckby24 Jul 200224 Jul 20021
d/s Wiske22 Jul 199722 Jul 19971
Thornton Bridge - Fry Survey20 Sept 198919 Sept 19965

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

1989–2025

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 101 measured fish were spread across different length ranges.

Smallest
4 cm
Lower quarter
9.7 cm
Median
14.6 cm
Upper quarter
21 cm
Largest
37.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Swale

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

Minnow Chub Bullhead Stone loach Dace Grayling

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 →