RiverFish

Perch · Perca fluviatilis

Perch in the River Ivel

Largest measured perch: 40 cm

The largest perch measured in Environment Agency surveys of the River Ivel was 40 cm, recorded at Henlow on 15 April 2005.

Across 314 measured perch, the median measured length was 21.4 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 Ivel.

See perch records across England →

Most recent observation8 October 2025Henlow · 15 fish
Largest measured perch
40 cm
Median length
21.4 cm
Fish measured
314
Survey locations
12

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
40 cm15 Apr 2005Henlow84380
39.5 cm7 Jul 2006Biggleswade Common99976
39 cm12 Jun 2013Girtford Weir136340
38.5 cm12 Jul 2006DS Iron Bridge100082
38.5 cm22 Aug 2003Saw Mills Tempsford78289
38 cm10 Jun 2016Girtford Weir148208
38 cm3 Apr 2006US Iron Bridge90598
37.5 cm30 Apr 2025Girtford Weir176390
37.5 cm15 Apr 2005Henlow84380
37.5 cm22 Aug 2003Saw Mills Tempsford78289

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
Henlow3 Jan 19928 Oct 202515
Girtford Weir7 Jul 198930 Apr 202514
Biggleswade Common9 Jun 198929 Apr 202514
Gt Ouse Confluence12 Jun 198919 May 201615
DS Iron Bridge3 May 199516 May 201611
Langford Mill26 Nov 200926 Nov 20091
US Iron Bridge3 Apr 20063 Apr 20061
Sandy27 Jan 199225 May 20054
Broom Mill16 Jan 199217 May 20053
High Romper Bridge23 Jun 198913 May 20053
Langford Nursery6 Jan 199229 Apr 20053
Saw Mills Tempsford22 Aug 200322 Aug 20031

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 314 measured fish were spread across different length ranges.

Smallest
5.6 cm
Lower quarter
14.8 cm
Median
21.4 cm
Upper quarter
29.4 cm
Largest
40 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ivel

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

Chub Pike Roach Gudgeon Dace Bullhead

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 →