RiverFish

Flounder · Platichthys flesus

Flounder in the River Frome

Largest measured flounder: 29.5 cm

The largest flounder measured in Environment Agency surveys of the River Frome was 29.5 cm, recorded at Mill Stream at East Stoke on 9 July 2019.

Across 127 measured flounder, the median measured length was 12.5 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 Frome.

See flounder records across England →

Most recent observation21 July 2023Mill Stream at East Stoke · 5 fish
Largest measured flounder
29.5 cm
Median length
12.5 cm
Fish measured
127
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
29.5 cm9 Jul 2019Mill Stream at East Stoke154770
26.9 cm14 Sept 2005Mill Stream at East Stoke86471
25.3 cm14 Sept 2007Mill Stream at East Stoke108182
24.5 cm19 Jul 2017Mill Stream at East Stoke151003
22.5 cm28 Aug 2013Mill Stream at East Stoke138687
22.1 cm21 Jul 2023Mill Stream at East Stoke162754
21.5 cm27 Aug 2009Mill Stream at East Stoke118883
21.5 cm7 Sept 2006Mill Stream at East Stoke101514
21.3 cm14 Sept 2005Mill Stream at East Stoke86471
21.1 cm1 Sept 2011Mill Stream at East Stoke127655

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
Mill Stream at East Stoke18 Oct 200421 Jul 202312

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

2004–2023

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 127 measured fish were spread across different length ranges.

Smallest
5.7 cm
Lower quarter
9.6 cm
Median
12.5 cm
Upper quarter
15.6 cm
Largest
29.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Frome

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

Brown / sea trout Atlantic salmon Bullhead European eel Grayling 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 →