RiverFish

Flounder · Platichthys flesus

Flounder in the River Glaven

Largest measured flounder: 22.8 cm

The largest flounder measured in Environment Agency surveys of the River Glaven was 22.8 cm, recorded at Upstream Wiveton Bridge on 19 May 2008.

Across 20 measured flounder, the median measured length was 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 Glaven.

See flounder records across England →

Most recent observation7 July 2017Upstream Wiveton Bridge · 3 fish
Largest measured flounder
22.8 cm
Median length
9 cm
Fish measured
20
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
22.8 cm19 May 2008Upstream Wiveton Bridge112080
15.7 cm7 Jul 2017Upstream Wiveton Bridge152330
14.8 cm7 Jul 2017Upstream Wiveton Bridge152330
13.3 cm19 May 2008Upstream Wiveton Bridge112080
12.4 cm19 May 2008Upstream Wiveton Bridge112080
12 cm19 Mar 1991Upstream Wiveton Bridge16846
10.7 cm7 Jul 2017Upstream Wiveton Bridge152330
10.4 cm10 Jun 2014Upstream Wiveton Bridge142232
10.2 cm19 Mar 1991Upstream Wiveton Bridge16846
10 cm19 Mar 1991Upstream Wiveton Bridge16846

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
Upstream Wiveton Bridge19 Mar 19917 Jul 20175
Cley Sluice9 Jul 19999 Jul 19991

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

1991–2017

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 20 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
4.6 cm
Median
9 cm
Upper quarter
12.1 cm
Largest
22.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Glaven

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

Bullhead 3-spined stickleback European eel Brook lamprey Pike 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 →