Perch · Perca fluviatilis

Perch in the River Western Rother

Largest measured perch: 38.7 cm

The largest perch measured in Environment Agency surveys of the River Western Rother was 38.7 cm, recorded at Terwick Mill on 11 July 2023.

Across 300 measured perch, the median measured length was 15.6 cm.

Surveyors recorded weights for 115 perch. The median was 1.6 oz (0.044 kg) and the largest recorded weight was 1 lb 4.2 oz (0.572 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 Western Rother.

See perch records across England →

Most recent observation18 June 2026Fittleworth Bridge · 7 fish

Largest measured perch: 38.7 cm
Median length: 15.6 cm
Fish measured: 300
Survey locations: 10

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
38.7 cm	11 Jul 2023	Terwick Mill	162685
35.4 cm	18 Jul 2017	Terwick Mill	151019
35 cm	11 Jul 2023	Terwick Mill	162685
35 cm	20 Jul 2016	Woolbeding	148663
34.9 cm	18 Jul 2017	Terwick Mill	151019
34.7 cm	21 Jul 2014	Terwick Mill	142005
34.3 cm	10 Jul 2023	Coultershaw	162518
33.6 cm	20 Jul 2016	Woolbeding	148663
33.6 cm	22 Jul 2013	Terwick Mill	137389
33.5 cm	16 Jun 2026	Terwick Mill	181732

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
Fittleworth Bridge	29 Jul 2004	18 Jun 2026	17
Coultershaw	30 Jun 2003	18 Jun 2026	15
Woolbeding	2 Aug 2006	17 Jun 2026	16
Terwick Mill	7 Jul 2006	16 Jun 2026	18
Liss	27 Sept 2001	18 Jul 2018	6
Stanbridge	16 Jul 2010	9 Jul 2018	3
Stedham Mill Downstream	15 Jul 2016	15 Jul 2016	1
Durford Bridge	17 Jul 2002	2 Sept 2014	7
North Mill Bypass pool	22 Jul 2009	22 Jul 2009	1
Adhurst	10 Jul 2003	10 Jul 2003	1

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

2001–2026

Survey records by year

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

101

102

303

304

205

606

507

408

509

510

311

512

313

314

415

516

317

418

219

020

021

422

323

324

425

426

Fish measured by surveyors

Measured length distribution

See how the 300 measured fish were spread across different length ranges.

Smallest: 2.7 cm
Lower quarter: 11.1 cm
Median: 15.6 cm
Upper quarter: 20 cm
Largest: 38.7 cm

0–99 mm

100–199 mm

178

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 115 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.7 oz (0.021 kg)
Median: 1.6 oz (0.044 kg)
Upper quarter: 3.1 oz (0.089 kg)
Heaviest: 1 lb 4.2 oz (0.572 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 Western Rother

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

European eel Brown / sea trout Bullhead Stone loach Minnow Chub

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 →