RiverFish

Flounder · Platichthys flesus

Flounder in the River Otter Sites

Largest measured flounder: 15 cm

The largest flounder measured in Environment Agency surveys of the River Otter Sites was 15 cm, recorded at Otterton Bridge (Dip/WFD) on 13 August 2010.

Across 20 measured flounder, the median measured length was 4.3 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 Otter Sites.

See flounder records across England →

Most recent observation21 June 2023Otterton Bridge (Dip/WFD) · 13 fish
Largest measured flounder
15 cm
Median length
4.3 cm
Fish measured
20
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
15 cm13 Aug 2010Otterton Bridge (Dip/WFD)123481
9.3 cm24 Sept 2007Otterton Bridge (Dip/WFD)108501
8.5 cm13 Aug 2010Otterton Bridge (Dip/WFD)123481
8 cm13 Aug 2010Otterton Bridge (Dip/WFD)123481
7.5 cm13 Aug 2010Otterton Bridge (Dip/WFD)123481
7.5 cm24 Sept 2007Otterton Bridge (Dip/WFD)108501
6.9 cm29 Jul 2021Otterton Bridge (Dip/WFD)160676
4.8 cm21 Jun 2023Otterton Bridge (Dip/WFD)163956
4.5 cm21 Jun 2023Otterton Bridge (Dip/WFD)163956
4.4 cm21 Jun 2023Otterton Bridge (Dip/WFD)163956

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
Otterton Bridge (Dip/WFD)24 Sept 200721 Jun 20235

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

2007–2023

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 20 measured fish were spread across different length ranges.

Smallest
2.9 cm
Lower quarter
3.4 cm
Median
4.4 cm
Upper quarter
7.5 cm
Largest
15 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Otter Sites

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

Brown / sea trout Bullhead European eel Stone loach Minnow 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 →