RiverFish

Perch · Perca fluviatilis

Perch in the Relief Channel

Largest measured perch: 34.8 cm

The largest perch measured in Environment Agency surveys of the Relief Channel was 34.8 cm, recorded at Downham Bridge on 2 September 1993.

Across 6,470 measured perch, the median measured length was 8 cm.

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

See perch records across England →

Most recent observation9 August 2023Thiefgate Lane Pylons · 223 fish
Largest measured perch
34.8 cm
Median length
8 cm
Fish measured
6,470
Survey locations
19

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
34.8 cm2 Sept 1993Downham Bridge30265
31.8 cm16 Sept 1993Saddlebow Bridge30274
28.8 cm11 Sept 1996Downham Bridge30277
28.6 cm8 Aug 2017DS Stow Bridge151136
27.8 cm22 Aug 2000Downham Bridge30817
26.3 cm2 Sept 1993Downham Bridge30265
21.8 cm11 Sept 1996Downham Bridge30277
21.8 cm2 Sept 1993Downham Bridge30265
20.3 cm11 Sept 1996Downham Bridge30277
19.3 cm16 Sept 1993Saddlebow Bridge30274

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
Thiefgate Lane Pylons9 Aug 20239 Aug 20231
Denver Sluice1 Sept 19938 Aug 202310
Wiggenhall Bridge10 Oct 19919 Aug 20179
DS Stow Bridge8 Sept 19888 Aug 20179
DS Denver Residual Sluice (Eel Monitoring)24 Jul 201224 Jul 20121
DS Denver Sluice18 Aug 20089 Oct 20082
Ivy Farm Saddle Bow21 Aug 200821 Aug 20081
Hastings Farm Wiggenhall21 Aug 200821 Aug 20081
Stow Bridge8 Sept 198819 Aug 20086
Gullpit Farm Stow Bridge19 Aug 200819 Aug 20081
Black Bank Dyke Sluice18 Aug 200818 Aug 20081
Tail Sluice15 Oct 199124 Aug 20055
Polver Farm Magdalen9 Oct 199117 Aug 20055
Magdalen Bridge8 Oct 199116 Aug 20055
Holme Farm Magdalen4 Oct 199115 Aug 20055
Downham Market STW7 Sept 198810 Aug 20056
Downham Bridge6 Oct 19889 Aug 20056
DS Downham Bridge6 Sept 19885 Aug 20056
Saddlebow Bridge11 Oct 199125 Sept 20004

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

1988–2023

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 6,470 measured fish were spread across different length ranges.

Smallest
4.2 cm
Lower quarter
7.3 cm
Median
8 cm
Upper quarter
9.3 cm
Largest
34.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Relief Channel

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

Roach Ruffe Zander Pike European eel Tench

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 →