RiverFish

Perch · Perca fluviatilis

Perch in the River US Lt Ouse

Largest measured perch: 34.3 cm

The largest perch measured in Environment Agency surveys of the River US Lt Ouse was 34.3 cm, recorded at Black Carr on 20 July 1988.

Across 670 measured perch, the median measured length was 12.8 cm.

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

See perch records across England →

Most recent observation20 August 2024Santon Downham · 5 fish
Largest measured perch
34.3 cm
Median length
12.8 cm
Fish measured
670
Survey locations
15

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
34.3 cm20 Jul 1988Black Carr30139
31.9 cm13 Aug 2024Two Mile Bottom166224
30.8 cm25 Jan 2000Nunnery Lakes30131
29.8 cm20 Aug 2024Santon Downham166459
29.8 cm9 Jul 2015Abbey Weir145358
29.8 cm4 Dec 1995US Knettishall Heath30166
29.3 cm25 Jan 2000Nunnery Lakes30131
28.3 cm23 Mar 2000Santon Downham30134
28.1 cm13 Aug 2024Two Mile Bottom166224
28 cm7 Aug 2024Abbey Weir166195

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
Santon Downham15 Jun 199020 Aug 20247
Two Mile Bottom18 Jun 199013 Aug 20246
Abbey Weir2 Feb 20007 Aug 20243
Rushford Bridge7 Dec 199516 Jul 20244
Blo Norton Bridge11 Jul 202411 Jul 20241
Hinderclay Fen10 Jul 202410 Jul 20241
Knettishall Heath19 Jan 20007 Jul 20153
Barnham Common5 Jan 19964 Jul 20073
Nuns Bridge24 May 200124 May 20011
Black Carr20 Jul 19881 Feb 20003
Nunnery Lakes9 Jan 199525 Jan 20002
DS Knettishall Heath19 Jan 200019 Jan 20001
US Knettishall Heath18 May 198818 Jan 20005
Blo Norton Ford17 May 198817 Jan 20004
Gasthorpe17 May 198817 May 19881

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

1988–2024

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 670 measured fish were spread across different length ranges.

Smallest
6.3 cm
Lower quarter
9.8 cm
Median
12.8 cm
Upper quarter
15.8 cm
Largest
34.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River US Lt Ouse

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

Bullhead Pike Dace European eel Gudgeon Roach

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 →