Perch · Perca fluviatilis

Perch in the River Mersey

Largest measured perch: 27 cm

The largest perch measured in Environment Agency surveys of the River Mersey was 27 cm, recorded at Mrme33 on 4 October 2000.

Across 394 measured perch, the median measured length was 15.1 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 Mersey.

See perch records across England →

Most recent observation17 October 2010Mrme45 · 136 fish

Largest measured perch: 27 cm
Median length: 15.1 cm
Fish measured: 394
Survey locations: 4

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
27 cm	4 Oct 2000	Mrme33	104057
26.8 cm	24 May 2000	Mrme33	104054
25.6 cm	17 Aug 2003	Mrme45	79300
24.7 cm	26 Sept 2004	Mrme45	82502
24.7 cm	17 Aug 2003	Mrme45	79300
24.6 cm	17 Oct 2010	Mrme45	125131
24.3 cm	18 Sept 2005	Mrme45	86252
24 cm	17 Aug 2003	Mrme45	79300
24 cm	17 Aug 2003	Mrme45	79300
23.7 cm	17 Aug 2003	Mrme45	79300

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
Mrme45	17 Aug 2003	17 Oct 2010	6
Mrme30	20 Aug 2009	20 Aug 2009	1
Mrme20	2 Oct 2003	2 Oct 2003	1
Mrme33	7 May 2000	18 Oct 2000	9

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

2000–2010

Survey records by year

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

900

001

002

203

104

105

006

107

008

209

110

Fish measured by surveyors

Measured length distribution

See how the 394 measured fish were spread across different length ranges.

Smallest: 6 cm
Lower quarter: 12 cm
Median: 15.1 cm
Upper quarter: 17.2 cm
Largest: 27 cm

0–99 mm

100–199 mm

282

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mersey

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

Gudgeon Roach 3-spined stickleback Chub Minnow 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 →