RiverFish

Perch · Perca fluviatilis

Perch in the River Middle Ouse

Largest measured perch: 38.3 cm

The largest perch measured in Environment Agency surveys of the River Middle Ouse was 38.3 cm, recorded at US Dolphin Meadow on 30 July 1999.

Across 9,070 measured perch, the median measured length was 8.3 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 Middle Ouse.

See perch records across England →

Most recent observation22 October 2025Holywell · 6 fish
Largest measured perch
38.3 cm
Median length
8.3 cm
Fish measured
9,070
Survey locations
41

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
38.3 cm30 Jul 1999US Dolphin Meadow29195
35.3 cm12 Oct 1998DS Samual Jones29156
34.3 cm26 Aug 1998DS Barford Power Station29153
33.8 cm26 Aug 1998DS Barford Power Station29153
31.3 cm8 Oct 2001US Dolphin Meadow30837
31.3 cm14 Jul 1992Little Paxton Nature Reserve29139
30.8 cm7 Aug 1989Wyboston Lakes29113
30.3 cm12 Oct 2001Portholme Meadow30835
29.8 cm1 Oct 2001Barford Bridge30832
29.3 cm24 Aug 1998Wyboston Lakes29151

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
Holywell31 Oct 198922 Oct 202516
Hemingford Meadow21 Oct 202521 Oct 20251
Houghton4 Oct 198916 Oct 20258
Portholme Meadow27 Sept 198915 Oct 202517
Pike & Eel8 Nov 198911 Oct 201915
US Dolphin Meadow24 Oct 19892 Oct 201915
St Neots Common14 Aug 19895 Oct 20186
Eynesbury19 Aug 20153 Oct 20182
Kelpie Marina8 Aug 19892 Oct 20187
Longholme24 Jul 19891 Oct 20187
Offord Triangle13 Sept 198921 Aug 20157
Hartford Church29 Sept 198920 Aug 201011
Renhold2 Aug 198924 Sept 20085
DS Barford Power Station11 Aug 19895 Sept 20085
Little Paxton18 Aug 19891 Sept 20085
Brownshill Pumping Station (Eel Monitoring)2 May 20072 May 20071
Hermitage Lock Drain (Eel Monitoring)25 Apr 200725 Apr 20071
Little Paxton Nature Reserve4 Sept 19891 Dec 20064
Dolphin Meadow25 Oct 19892 Sept 20034
Hemingford Grey23 Oct 198928 Aug 20034
Castle Hills Huntingdon2 Oct 198926 Aug 20034
Mow Fen2 Nov 19894 Aug 20035
St Ives26 Oct 198925 Jul 20035
Brampton25 Sept 19893 Oct 20014
Barford Bridge3 Aug 19891 Oct 20014
Earith17 Sept 199217 Aug 19993
Bluntisham10 Nov 19896 Aug 19994
Meadow Lane St Ives29 Oct 19903 Aug 19994
Hemingford Abbots5 Oct 198926 Jul 19993
Houghton Lock3 Oct 198919 Jul 19993
Hartford12 Oct 198913 Jul 19993
Portholme Lock28 Sept 19899 Jul 19993
Buckden Marina15 Sept 198914 Oct 19983
DS Samual Jones17 Aug 198912 Oct 19983
Offord Intake12 Sept 198914 Sept 19983
Riverside Park11 Aug 19892 Sept 19983
Barford Power Station9 Aug 198925 Aug 19983
Wyboston Lakes7 Aug 198924 Aug 19983
Blunham4 Aug 198913 Aug 19983
Willington1 Aug 198911 Aug 19983
Cardington Navigation31 Jul 19895 Aug 19983

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 9,070 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
7.3 cm
Median
8.3 cm
Upper quarter
10.6 cm
Largest
38.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Middle Ouse

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

Roach Pike Bleak Gudgeon Common bream Dace

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 →