Flounder · Platichthys flesus

Flounder in the River Ravensbourne

Largest measured flounder: 30 cm

The largest flounder measured in Environment Agency surveys of the River Ravensbourne was 30 cm, recorded at Deptford Creek on 26 November 1991.

Across 44 measured flounder, the median measured length was 10.8 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 Ravensbourne.

See flounder records across England →

Most recent observation8 April 2008Brook Mill Park Enhancement Site · 2 fish

Largest measured flounder: 30 cm
Median length: 10.8 cm
Fish measured: 44
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
30 cm	26 Nov 1991	Deptford Creek	122320
25.7 cm	26 Nov 1991	Deptford Creek	122320
25.3 cm	26 Nov 1991	Deptford Creek	122320
22.6 cm	26 Nov 1991	Deptford Creek	122320
22.3 cm	26 Nov 1991	Deptford Creek	122320
20.8 cm	26 Nov 1991	Deptford Creek	122320
17 cm	26 Nov 1991	Deptford Creek	122320
14.5 cm	26 Nov 1991	Deptford Creek	122320
14 cm	26 Nov 1991	Deptford Creek	122320
13.6 cm	26 Nov 1991	Deptford Creek	122320

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
Brook Mill Park Enhancement Site	8 Apr 2008	8 Apr 2008	1
Deptford Creek	26 Nov 1991	26 Nov 1991	1
Bliss Crescent	5 Nov 1991	5 Nov 1991	1

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

1991–2008

Survey records by year

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

291

092

093

094

095

096

097

098

099

000

001

002

003

004

005

006

007

108

Fish measured by surveyors

Measured length distribution

See how the 44 measured fish were spread across different length ranges.

Smallest: 4.8 cm
Lower quarter: 7.4 cm
Median: 10.8 cm
Upper quarter: 13.3 cm
Largest: 30 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 River Ravensbourne

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

3-spined stickleback European eel Stone loach Common goby Roach

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 →