RiverFish

Flounder · Platichthys flesus

Flounder in the River Main Par

Largest measured flounder: 14.7 cm

The largest flounder measured in Environment Agency surveys of the River Main Par was 14.7 cm, recorded at A3082 Bridge on 7 July 2022.

Across 66 measured flounder, the median measured length was 9.1 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 Main Par.

See flounder records across England →

Most recent observation7 July 2022A3082 Bridge · 21 fish
Largest measured flounder
14.7 cm
Median length
9.1 cm
Fish measured
66
Survey locations
1

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
14.7 cm7 Jul 2022A3082 Bridge161633
13.9 cm10 Jun 2015A3082 Bridge144936
13.7 cm7 Jul 2022A3082 Bridge161633
13.6 cm7 Jul 2022A3082 Bridge161633
13.5 cm7 Jul 2022A3082 Bridge161633
13 cm7 Jul 2022A3082 Bridge161633
12.9 cm7 Jul 2022A3082 Bridge161633
12.2 cm7 Jul 2022A3082 Bridge161633
12.1 cm17 May 2010A3082 Bridge122416
12 cm7 Jul 2022A3082 Bridge161633

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
A3082 Bridge6 Jun 20067 Jul 20225

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

2006–2022

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 66 measured fish were spread across different length ranges.

Smallest
3.3 cm
Lower quarter
7.4 cm
Median
9.1 cm
Upper quarter
10.9 cm
Largest
14.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Par

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

Brown / sea trout European eel 3-spined stickleback

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 →