RiverFish

Flounder · Platichthys flesus

Flounder in the Eel Survey

Largest measured flounder: 20.3 cm

The largest flounder measured in Environment Agency surveys of the Eel Survey was 20.3 cm, recorded at Riverside Farm on 4 July 2013.

Across 13 measured flounder, the median measured length was 9.4 cm.

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

See flounder records across England →

Most recent observation16 July 2013Bow Bridge · 1 fish
Largest measured flounder
20.3 cm
Median length
9.4 cm
Fish measured
13
Survey locations
3

Individual EA measurements

Largest measured flounder

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
20.3 cm4 Jul 2013Riverside Farm139742
18.8 cm4 Jul 2013Riverside Farm139742
17.5 cm4 Jul 2013Riverside Farm139742
15.5 cm16 Jul 2013Bow Bridge139722
11.4 cm19 Sept 2012Bow Bridge133697
11 cm11 Aug 2009Oath Lock Downstream120682
9.4 cm19 Sept 2012Bow Bridge133697
9 cm19 Sept 2012Bow Bridge133697
8.7 cm19 Sept 2012Bow Bridge133697
8.1 cm19 Sept 2012Bow Bridge133697

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where flounder were found

Each point marks a survey location with at least one flounder 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 flounder
Bow Bridge19 Sept 201216 Jul 20132
Riverside Farm4 Jul 20134 Jul 20131
Oath Lock Downstream11 Aug 200912 Aug 20092

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

2009–2013

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 13 measured fish were spread across different length ranges.

Smallest
5 cm
Lower quarter
8.1 cm
Median
9.4 cm
Upper quarter
15.5 cm
Largest
20.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Eel Survey

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

European eel Roach Gudgeon Bullhead Perch Stone loach

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 →