RiverFish

Flounder · Platichthys flesus

Flounder in the South Forty Foot Drain

Largest measured flounder: 36.3 cm

The largest flounder measured in Environment Agency surveys of the South Forty Foot Drain was 36.3 cm, recorded at Wyberton Bridge Upstream on 23 August 2006.

Across 264 measured flounder, the median measured length was 13.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the South Forty Foot Drain.

See flounder records across England →

Most recent observation18 September 2012Swineshead Bridge Downstream · 1 fish
Largest measured flounder
36.3 cm
Median length
13.7 cm
Fish measured
264
Survey locations
7

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
36.3 cm23 Aug 2006Wyberton Bridge Upstream100890
33.5 cm28 Sept 2009Wyberton Bridge Upstream119331
33.2 cm10 Jul 1990Upstream Rod Rest57720
32.8 cm15 Jul 1987Hubberts Bridge R/B Upstream57700
31.7 cm12 Jul 1990Hubberts Bridge R/B Upstream57721
31.6 cm16 Jul 1990Wyberton Bridge Upstream57722
30.8 cm26 Jul 1995Wyberton Bridge Upstream57732
30.6 cm12 Jul 1990Hubberts Bridge R/B Upstream57721
29.7 cm20 Oct 2003Wyberton Bridge Upstream78628
29.3 cm12 Jul 1990Hubberts Bridge R/B Upstream57721

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
Swineshead Bridge Downstream14 Jul 198718 Sept 20124
Wyberton Bridge Upstream24 Jul 19879 Sept 201013
Hubberts Bridge R/B Upstream15 Jul 198724 Sept 20085
Bicker Fen17 Sept 200817 Sept 20081
Upstream Rod Rest13 Jul 198726 Jul 19994
Downstream AWA Wyberton Labortory22 Jul 198716 Aug 19953
Swineshead Bridge4 Jul 19904 Jul 19901

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

1987–2012

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 264 measured fish were spread across different length ranges.

Smallest
4.1 cm
Lower quarter
7.7 cm
Median
13.7 cm
Upper quarter
17.8 cm
Largest
36.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the South Forty Foot Drain

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

Perch Roach Pike Common bream Silver bream Dace

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 →