RiverFish

Flounder · Platichthys flesus

Flounder in the River Frome

Largest measured flounder: 38.7 cm

The largest flounder measured in Environment Agency surveys of the River Frome was 38.7 cm, recorded at Rehabilitation site on 27 September 2001.

Across 233 measured flounder, the median measured length was 7.9 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 Frome.

See flounder records across England →

Most recent observation16 August 2024d/s Sharpness Canal · 12 fish
Largest measured flounder
38.7 cm
Median length
7.9 cm
Fish measured
233
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
38.7 cm27 Sept 2001Rehabilitation site23005
28.5 cm7 Sept 2005d/s Sharpness Canal85998
25.5 cm27 Sept 2001Upstream Whitminster Weir23006
25 cm18 Sept 2003d/s Sharpness Canal77054
24.1 cm2 Oct 2008d/s Sharpness Canal115034
24 cm21 Sept 2006d/s Sharpness Canal101427
23.8 cm2 Oct 2008d/s Sharpness Canal115034
23.7 cm7 Sept 2005d/s Sharpness Canal85998
23.2 cm7 Sept 2005d/s Sharpness Canal85998
23.1 cm18 Sept 2003d/s Sharpness Canal77054

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
d/s Sharpness Canal16 Aug 200216 Aug 202415
Rehabilitation site27 Sept 200117 Sept 20022
Upstream Whitminster Weir27 Sept 200127 Sept 20011

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

2001–2024

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 233 measured fish were spread across different length ranges.

Smallest
3.5 cm
Lower quarter
6.3 cm
Median
7.9 cm
Upper quarter
16 cm
Largest
38.7 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 Bullhead European eel 3-spined stickleback Roach Pike

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 →