Flounder · Platichthys flesus

Flounder in the Asheldham Brook

Largest measured flounder: 34.2 cm

The largest flounder measured in Environment Agency surveys of the Asheldham Brook was 34.2 cm, recorded at Grange Outfall on 2 October 1986.

Across 97 measured flounder, the median measured length was 5.9 cm.

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

See flounder records across England →

Most recent observation24 April 2003Asheldham Brook Spatial · 11 fish

Largest measured flounder: 34.2 cm
Median length: 5.9 cm
Fish measured: 97
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.

Length	Survey date	Survey location	Survey ID
34.2 cm	2 Oct 1986	Grange Outfall	14577
25 cm	2 Oct 1986	Grange Outfall	14577
20.1 cm	2 Oct 1986	Grange Outfall	14577
18.9 cm	2 Oct 1986	Grange Outfall	14577
15.4 cm	6 Dec 1989	Grange Outfall	14581
14.9 cm	2 Oct 1986	Grange Outfall	14577
13.3 cm	6 Dec 1989	Grange Outfall	14581
11.1 cm	6 Dec 1989	Grange Outfall	14581
10.6 cm	2 Oct 1986	Grange Outfall	14577
10.5 cm	2 Oct 1986	Grange Outfall	14577

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 surveyed	First recorded	Last recorded	Visits finding flounder
Asheldham Brook Spatial	24 Apr 2003	24 Apr 2003	1
Grange Outfall	2 Oct 1986	1 Dec 1995	4
Round Barn Farm	13 Jul 1993	13 Jul 1993	1

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

1986–2003

Survey records by year

Each bar shows how many survey visits recorded flounder that year.

186

087

088

189

090

091

092

293

094

195

096

097

098

099

000

001

002

103

Fish measured by surveyors

Measured length distribution

See how the 97 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 5.2 cm
Median: 5.9 cm
Upper quarter: 6.7 cm
Largest: 34.2 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Asheldham Brook

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

European eel 3-spined stickleback Thick lipped grey mullet

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 →