RiverFish

Flounder · Platichthys flesus

Flounder in the River Heacham

Largest measured flounder: 32.3 cm

The largest flounder measured in Environment Agency surveys of the River Heacham was 32.3 cm, recorded at Heacham Manor on 18 April 1996.

Across 49 measured flounder, the median measured length was 10.3 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 Heacham.

See flounder records across England →

Most recent observation19 May 2008DS Heacham Weir (Eel Monitoring) · 3 fish
Largest measured flounder
32.3 cm
Median length
10.3 cm
Fish measured
49
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.

LengthSurvey dateSurvey locationSurvey ID
32.3 cm18 Apr 1996Heacham Manor30324
20.3 cm15 Apr 1996North Beach30325
19.3 cm6 Feb 1989North Beach30319
18.3 cm18 Apr 1996Heacham Manor30324
18.3 cm18 Apr 1996Heacham Manor30324
15.3 cm18 Apr 1996Heacham Manor30324
14.3 cm18 Apr 1996Heacham Manor30324
14.3 cm18 Apr 1996Heacham Manor30324
14.3 cm30 Jan 1992Heacham Manor30321
13.3 cm15 Apr 1996North Beach30325

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
DS Heacham Weir (Eel Monitoring)19 May 200819 May 20081
Heacham Manor8 Feb 198918 Apr 19963
North Beach6 Feb 198915 Apr 19962

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

1989–2008

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 49 measured fish were spread across different length ranges.

Smallest
6.3 cm
Lower quarter
8.3 cm
Median
10.3 cm
Upper quarter
12.3 cm
Largest
32.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Heacham

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

European eel 3-spined stickleback Brown / sea trout

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 →