RiverFish

Flounder · Platichthys flesus

Flounder in the River Main Yealm

Largest measured flounder: 14.1 cm

The largest flounder measured in Environment Agency surveys of the River Main Yealm was 14.1 cm, recorded at Puslinch Bridge on 18 June 2009.

Across 54 measured flounder, the median measured length was 4.9 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 Yealm.

See flounder records across England →

Most recent observation14 August 2024Puslinch Bridge · 2 fish
Largest measured flounder
14.1 cm
Median length
4.9 cm
Fish measured
54
Survey locations
2

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
14.1 cm18 Jun 2009Puslinch Bridge117440
14 cm18 Jun 2009Puslinch Bridge117440
13.3 cm18 Jun 2009Puslinch Bridge117440
11.8 cm18 Jun 2009Puslinch Bridge117440
8.7 cm7 Aug 2018Puslinch Bridge153394
8.6 cm18 Jun 2009Puslinch Bridge117440
8 cm31 Aug 2023Downstream Puslinch Br163641
7.2 cm7 Aug 2018Puslinch Bridge153394
7.1 cm23 Aug 2012Puslinch Bridge132978
6.8 cm31 Aug 2023Downstream Puslinch Br163641

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
Puslinch Bridge5 Aug 200214 Aug 202413
Downstream Puslinch Br31 Aug 202331 Aug 20231

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

2002–2024

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 54 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
4.1 cm
Median
4.9 cm
Upper quarter
6.1 cm
Largest
14.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Yealm

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

Brown / sea trout Atlantic salmon European eel Bullhead Minnow Brook lamprey

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 →