Perch · Perca fluviatilis

Perch in the River Great Ouse

Largest measured perch: 17.8 cm

The largest perch measured in Environment Agency surveys of the River Great Ouse was 17.8 cm, recorded at US A.G. Wright Sluice on 24 October 2012.

Across 14 measured perch, the median measured length was 8.2 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 Great Ouse.

See perch records across England →

Most recent observation16 April 2026DS Brownshill Staunch · 6 fish

Largest measured perch: 17.8 cm
Median length: 8.2 cm
Fish measured: 14
Survey locations: 7

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
17.8 cm	24 Oct 2012	US A.G. Wright Sluice	134395
16.1 cm	23 Mar 2026	DS Brownshill Staunch	180791
11.2 cm	16 Apr 2026	DS Brownshill Staunch	180999
10 cm	24 Oct 2012	US A.G. Wright Sluice	134395
8.6 cm	16 Apr 2026	DS Brownshill Staunch	180999
8.4 cm	16 Apr 2026	DS Brownshill Staunch	180999
8.3 cm	23 Oct 2012	US A.G. Wright Sluice	134385
8.1 cm	23 Oct 2012	US A.G. Wright Sluice	134385
8 cm	16 Apr 2026	DS Brownshill Staunch	180999
7.8 cm	16 Apr 2026	DS Brownshill Staunch	180999

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
DS Brownshill Staunch	23 Mar 2026	16 Apr 2026	2
US A.G. Wright Sluice	26 Nov 2008	24 Oct 2012	9
Pike & Eel	17 Nov 2010	19 Nov 2010	2
US Denver Little Eye Sluice	29 Oct 2008	18 Nov 2010	8
US Brownshill Staunch	28 Oct 2008	3 Dec 2009	5
DS Holywell	4 Jul 2008	17 Jul 2008	2
DS Brownshill Staunch	17 Jul 2008	17 Jul 2008	1

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

2008–2026

Survey records by year

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

1308

609

610

011

212

013

014

015

016

017

018

019

020

021

022

023

024

025

226

Fish measured by surveyors

Measured length distribution

See how the 14 measured fish were spread across different length ranges.

Smallest: 6.3 cm
Lower quarter: 7.4 cm
Median: 8.2 cm
Upper quarter: 9.7 cm
Largest: 17.8 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Great Ouse

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

European eel Roach Ruffe Pike 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 →