RiverFish

Perch · Perca fluviatilis

Perch in the River Test

Largest measured perch: 33.4 cm

The largest perch measured in Environment Agency surveys of the River Test was 33.4 cm, recorded at Mayfly on 4 October 2004.

Across 89 measured perch, the median measured length was 15.8 cm.

Surveyors recorded weights for 36 perch. The median was 1.4 oz (0.0405 kg) and the largest recorded weight was 15.9 oz (0.452 kg).

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

See perch records across England →

Most recent observation22 August 2025Romsey War Memorial Park · 7 fish
Largest measured perch
33.4 cm
Median length
15.8 cm
Fish measured
89
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
33.4 cm4 Oct 2004Mayfly82642
28.5 cm17 Apr 2014Romsey Canal140734
28.5 cm11 Aug 2010Romsey War Memorial Park123816
27.5 cm28 Jul 2023Romsey War Memorial Park162829
26.7 cm17 Apr 2014Romsey Canal140734
26.5 cm17 Apr 2014Romsey Canal140734
26.4 cm27 Jun 2019Romsey War Memorial Park154693
26.2 cm4 Jul 2017Romsey War Memorial Park150774
25.5 cm17 Apr 2014Romsey Canal140734
25.4 cm15 Aug 2007Romsey War Memorial Park106356

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
Romsey War Memorial Park5 Sept 200522 Aug 202510
Kimbridge Mill Cottage13 Sept 202413 Sept 20241
Longbridge9 Sept 20222 Sept 20242
Meadowview20 Sept 202320 Sept 20231
Mottisfont, Oakley Farm18 Sept 202318 Sept 20231
Romsey Canal26 Aug 200514 Sept 20235
Romsey World of Water18 Jul 201818 Jul 20181
Fish Lake29 Sept 200315 Jul 20145
Red River Carrier, Broadlands14 Jun 201314 Jun 20131
Timsbury Manor Carrier24 Sept 20029 Aug 20065
Mayfly4 Oct 20044 Oct 20041
House Beat2 Sept 20042 Sept 20041

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

2002–2025

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 89 measured fish were spread across different length ranges.

Smallest
5.3 cm
Lower quarter
12.1 cm
Median
15.8 cm
Upper quarter
20.5 cm
Largest
33.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 36 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.004 kg)
Lower quarter
0.8 oz (0.0218 kg)
Median
1.4 oz (0.0405 kg)
Upper quarter
2.2 oz (0.0632 kg)
Heaviest
15.9 oz (0.452 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Test

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

Brown / sea trout European eel Bullhead Minnow Stone loach Grayling

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 →