Flounder · Platichthys flesus

Flounder in the River Great Stour

Largest measured flounder: 31.9 cm

The largest flounder measured in Environment Agency surveys of the River Great Stour was 31.9 cm, recorded at Willow Close on 21 July 2003.

Across 19 measured flounder, the median measured length was 6.7 cm.

Surveyors recorded weights for 5 flounder. The median was 3.5 oz (0.098 kg) and the largest recorded weight was 8.1 oz (0.23 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Great Stour.

See flounder records across England →

Most recent observation29 September 2009Sturry STW · 1 fish

Largest measured flounder: 31.9 cm
Median length: 6.7 cm
Fish measured: 19
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.

Length	Survey date	Survey location	Survey ID
31.9 cm	21 Jul 2003	Willow Close	76725
21 cm	29 Sept 2009	Sturry STW	120401
21 cm	21 Jul 2003	Willow Close	76725
20.2 cm	21 Jul 2003	Willow Close	76725
16.2 cm	21 Jul 2003	Willow Close	76725
14.6 cm	21 Jul 2003	Willow Close	76725
7.7 cm	31 Oct 2006	Grove Ferry	103385
7 cm	31 Oct 2006	Grove Ferry	103385
6.8 cm	31 Oct 2006	Grove Ferry	103385
6.7 cm	31 Oct 2006	Grove Ferry	103385

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 surveyed	First recorded	Last recorded	Visits finding flounder
Sturry STW	29 Sept 2009	29 Sept 2009	1
Grove Ferry	31 Oct 2006	31 Oct 2006	1
Willow Close	21 Jul 2003	21 Jul 2003	1

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

2003–2009

Survey records by year

Each bar shows how many survey visits recorded flounder that year.

103

004

005

106

007

008

109

Fish measured by surveyors

Measured length distribution

See how the 19 measured fish were spread across different length ranges.

Smallest: 4.6 cm
Lower quarter: 6.1 cm
Median: 6.7 cm
Upper quarter: 15.4 cm
Largest: 31.9 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 5 flounder. This is a subset of the measured fish and may not represent the whole population.

Lightest: 1.1 oz (0.032 kg)
Lower quarter: 1.6 oz (0.046 kg)
Median: 3.5 oz (0.098 kg)
Upper quarter: 4 oz (0.114 kg)
Heaviest: 8.1 oz (0.23 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Great Stour

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

European eel Chub Gudgeon Roach Bullhead Perch

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 →