Flounder · Platichthys flesus

Flounder in the Kirby Brook

Largest measured flounder: 24.2 cm

The largest flounder measured in Environment Agency surveys of the Kirby Brook was 24.2 cm, recorded at Holland Haven on 9 November 1993.

Across 16 measured flounder, the median measured length was 18 cm.

Surveyors recorded weights for 2 flounder. The median was 4 oz (0.114 kg) and the largest recorded weight was 5.8 oz (0.164 kg).

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

See flounder records across England →

Most recent observation9 November 1993Holland Haven · 1 fish

Largest measured flounder: 24.2 cm
Median length: 18 cm
Fish measured: 16
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.

Length	Survey date	Survey location	Survey ID
24.2 cm	9 Nov 1993	Holland Haven	14631
23.6 cm	31 Oct 1990	Holland Haven	14623
22.5 cm	8 Nov 1984	Holland Haven	14603
22 cm	19 Nov 1984	Frinton Golf Course	14604
21.3 cm	19 Nov 1984	Frinton Golf Course	14604
20.1 cm	8 Nov 1984	Holland Haven	14603
19.1 cm	8 Nov 1984	Holland Haven	14603
18.9 cm	8 Nov 1984	Holland Haven	14603
17.1 cm	9 Nov 1987	Holland Haven	14613
16.9 cm	8 Nov 1984	Holland Haven	14603

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
Holland Haven	8 Nov 1984	9 Nov 1993	4
Frinton Golf Course	19 Nov 1984	19 Nov 1984	1

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

1984–1993

Survey records by year

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

284

085

086

187

088

089

190

091

092

193

Fish measured by surveyors

Measured length distribution

See how the 16 measured fish were spread across different length ranges.

Smallest: 12.9 cm
Lower quarter: 15.6 cm
Median: 18 cm
Upper quarter: 21.5 cm
Largest: 24.2 cm

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 2 flounder. This is a subset of the measured fish and may not represent the whole population.

Lightest: 2.3 oz (0.064 kg)
Lower quarter: 3.1 oz (0.089 kg)
Median: 4 oz (0.114 kg)
Upper quarter: 4.9 oz (0.139 kg)
Heaviest: 5.8 oz (0.164 kg)

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

More fish in this river

Explore the Kirby Brook

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

Roach Rudd

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 →