Flounder · Platichthys flesus

Flounder in the River Idle

Largest measured flounder: 40.1 cm

The largest flounder measured in Environment Agency surveys of the River Idle was 40.1 cm, recorded at Bawtry on 4 May 2011.

Across 28 measured flounder, the median measured length was 28.9 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 Idle.

See flounder records across England →

Most recent observation4 May 2011Bawtry · 1 fish

Largest measured flounder: 40.1 cm
Median length: 28.9 cm
Fish measured: 28
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.

Length	Survey date	Survey location	Survey ID
40.1 cm	4 May 2011	Bawtry	126161
39.4 cm	18 May 2010	Bawtry	121693
38 cm	25 Jun 2008	Bawtry	111519
37.1 cm	9 Sept 2004	Bawtry	82030
36.5 cm	9 Sept 2004	Bawtry	82030
34.7 cm	21 Oct 2003	Mattersey Priory	78623
34.2 cm	9 Sept 2004	Bawtry	82030
34.1 cm	10 Oct 2002	Bawtry	63980
33 cm	3 Nov 2003	Bawtry	78630
32.8 cm	28 Oct 2003	Haxey Gate	78632

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
Bawtry	16 May 1984	4 May 2011	8
Haxey Gate	28 Oct 2003	20 Oct 2005	2
Misterton Soss	12 May 1995	13 Sept 2004	2
Mattersey Priory	7 Oct 2002	21 Oct 2003	2

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

1984–2011

Survey records by year

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

184

085

086

087

088

089

090

091

092

093

094

195

096

097

098

099

000

001

202

303

204

205

006

007

108

009

110

111

Fish measured by surveyors

Measured length distribution

See how the 28 measured fish were spread across different length ranges.

Smallest: 11.3 cm
Lower quarter: 21.1 cm
Median: 28.9 cm
Upper quarter: 34.1 cm
Largest: 40.1 cm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Idle

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

European eel Roach Perch Pike Chub Gudgeon

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 →