Flounder · Platichthys flesus

Flounder in the C&B Navigation (Long Pond)

Largest measured flounder: 25 cm

The largest flounder measured in Environment Agency surveys of the C&B Navigation (Long Pond) was 25 cm, recorded at Beeleigh Golf Course on 19 October 2004.

Across 18 measured flounder, the median measured length was 10.3 cm.

Surveyors recorded weights for 8 flounder. The median was 0.2 oz (0.0055 kg) and the largest recorded weight was 0.7 oz (0.019 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the C&B Navigation (Long Pond).

See flounder records across England →

Most recent observation19 October 2004Beeleigh Golf Course · 1 fish

Largest measured flounder: 25 cm
Median length: 10.3 cm
Fish measured: 18
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
25 cm	19 Oct 2004	Beeleigh Golf Course	83261
18.6 cm	14 Oct 1986	Beeleigh Golf Course	14259
16.1 cm	16 Oct 2001	Iron Bridge (C&B Canal)	21165
16 cm	22 Jun 1998	Heybridge Viaduct	14418
15.2 cm	13 Oct 1986	Iron Bridge (C&B Canal)	14257
13.2 cm	22 Jun 1998	Heybridge Viaduct	14418
13 cm	13 Oct 1986	Iron Bridge (C&B Canal)	14257
11 cm	13 Oct 1986	Iron Bridge (C&B Canal)	14257
10.5 cm	14 Oct 1986	Beeleigh Golf Course	14259
10.2 cm	29 Jun 1992	Heybridge Viaduct	14338

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
Beeleigh Golf Course	14 Oct 1986	19 Oct 2004	3
Iron Bridge (C&B Canal)	13 Oct 1986	16 Oct 2001	2
Heybridge Viaduct	18 Jun 1986	22 Jun 1998	3

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

1986–2004

Survey records by year

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

386

087

088

089

090

091

192

093

094

095

096

097

298

099

000

101

002

003

104

Fish measured by surveyors

Measured length distribution

See how the 18 measured fish were spread across different length ranges.

Smallest: 4.9 cm
Lower quarter: 8.8 cm
Median: 10.4 cm
Upper quarter: 14.7 cm
Largest: 25 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 8 flounder. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.003 kg)
Lower quarter: 0.2 oz (0.0048 kg)
Median: 0.2 oz (0.0055 kg)
Upper quarter: 0.4 oz (0.0105 kg)
Heaviest: 0.7 oz (0.019 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the C&B Navigation (Long Pond)

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

European eel Perch Roach Pike Common bream Tench

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 →