Perch · Perca fluviatilis

Perch in the River Thames Tribs

Largest measured perch: 25.5 cm

The largest perch measured in Environment Agency surveys of the River Thames Tribs was 25.5 cm, recorded at Odney Stream on 23 September 2015.

Across 114 measured perch, the median measured length was 9.1 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 Thames Tribs.

See perch records across England →

Most recent observation5 November 2019Roundmoor Ditch · 7 fish

Largest measured perch: 25.5 cm
Median length: 9.1 cm
Fish measured: 114
Survey locations: 3

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
25.5 cm	23 Sept 2015	Odney Stream	146676
22.6 cm	5 Nov 2019	Roundmoor Ditch	155944
22.3 cm	21 Sept 2015	Bray Mill Stream	146675
21.2 cm	5 Nov 2019	Roundmoor Ditch	155944
21 cm	6 Oct 2006	Bray Mill Stream	101770
20.7 cm	23 Sept 2015	Odney Stream	146676
20.5 cm	23 Sept 2015	Odney Stream	146676
20.4 cm	5 Nov 2019	Roundmoor Ditch	155944
20.3 cm	23 Sept 2015	Odney Stream	146676
20.2 cm	23 Sept 2015	Odney Stream	146676

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
Roundmoor Ditch	5 Nov 2019	5 Nov 2019	1
Odney Stream	5 Aug 2009	23 Sept 2015	2
Bray Mill Stream	6 Oct 2006	21 Sept 2015	3

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

2006–2019

Survey records by year

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

106

007

008

209

010

011

012

013

014

215

016

017

018

119

Fish measured by surveyors

Measured length distribution

See how the 114 measured fish were spread across different length ranges.

Smallest: 4.7 cm
Lower quarter: 6.4 cm
Median: 9.1 cm
Upper quarter: 15.8 cm
Largest: 25.5 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 Thames Tribs

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

Chub Dace Gudgeon Roach European eel Barbel

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 →