RiverFish

Flounder · Platichthys flesus

Flounder in the Louth Canal

Largest measured flounder: 33.8 cm

The largest flounder measured in Environment Agency surveys of the Louth Canal was 33.8 cm, recorded at Tetney Lock on 13 May 2010.

Across 43 measured flounder, the median measured length was 13 cm.

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

See flounder records across England →

Most recent observation17 June 2015Thoresby Bridge · 1 fish
Largest measured flounder
33.8 cm
Median length
13 cm
Fish measured
43
Survey locations
2

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
33.8 cm13 May 2010Tetney Lock121712
29.5 cm1 Jun 2004Tetney Lock80252
29.4 cm17 Jun 2015Thoresby Bridge145077
23.4 cm1 Jun 2004Tetney Lock80252
22.5 cm13 May 2010Tetney Lock121712
22.4 cm1 Jun 2004Tetney Lock80252
21.1 cm13 May 2010Tetney Lock121712
18.4 cm16 Jun 1999Thoresby Bridge58060
16.3 cm7 Sept 1995Thoresby Bridge58046
16 cm1 Jun 2004Tetney Lock80252

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
Thoresby Bridge9 Jun 198617 Jun 20154
Tetney Lock1 Jun 200413 May 20102

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

1986–2015

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 43 measured fish were spread across different length ranges.

Smallest
8.4 cm
Lower quarter
10.9 cm
Median
13 cm
Upper quarter
15.3 cm
Largest
33.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Louth Canal

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

Roach European eel 3-spined stickleback Gudgeon Perch 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 →