RiverFish

Flounder · Platichthys flesus

Flounder in the Trader/Maud Foster Drain

Largest measured flounder: 32.3 cm

The largest flounder measured in Environment Agency surveys of the Trader/Maud Foster Drain was 32.3 cm, recorded at Windsor Bank Boston on 13 June 1996.

Across 48 measured flounder, the median measured length was 15.5 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Trader/Maud Foster Drain.

See flounder records across England →

Most recent observation29 June 2009Windsor Bank Boston · 4 fish
Largest measured flounder
32.3 cm
Median length
15.5 cm
Fish measured
48
Survey locations
4

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
32.3 cm13 Jun 1996Windsor Bank Boston58241
31.4 cm3 Jun 1987Upstream Boston Golf Club58198
29.6 cm4 Jun 2007Upstream Boston Golf Club105459
26.2 cm13 Jun 1996Windsor Bank Boston58241
24.7 cm13 Jun 1996Windsor Bank Boston58241
23.2 cm13 Jun 1996Windsor Bank Boston58241
22.6 cm10 Jun 1987Trader Bank Sibsey58201
22.6 cm3 Jun 1987Upstream Boston Golf Club58198
21.5 cm11 May 1993Windsor Bank Boston58227
21.3 cm11 May 1993Windsor Bank Boston58227

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
Windsor Bank Boston11 Jun 198729 Jun 20096
Upstream Boston Golf Club3 Jun 19874 Jun 20072
Trader Bank Sibsey10 Jun 198710 Jun 19871
Horncastle Road5 Jun 19875 Jun 19871

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

1987–2009

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 48 measured fish were spread across different length ranges.

Smallest
8.1 cm
Lower quarter
11.5 cm
Median
15.5 cm
Upper quarter
19.3 cm
Largest
32.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Trader/Maud Foster Drain

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

Common bream Roach Perch Pike Silver bream Ruffe

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 →