RiverFish

Dace · Leuciscus leuciscus

Dace in the River Marlow - Cookham

Largest measured dace: 23.5 cm

The largest dace measured in Environment Agency surveys of the River Marlow - Cookham was 23.5 cm, recorded at Marlow - Cookham Upper Main Channel on 1 September 1995.

Across 663 measured dace, the median measured length was 12.1 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 Marlow - Cookham.

See dace records across England →

Most recent observation27 July 2025Marlow - Cookham Upper Main Channel · 2 fish
Largest measured dace
23.5 cm
Median length
12.1 cm
Fish measured
663
Survey locations
4

Individual EA measurements

Largest measured dace

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
23.5 cm1 Sept 1995Marlow - Cookham Upper Main Channel121546
23.5 cm1 Sept 1995Marlow - Cookham Upper Main Channel121546
22.5 cm1 Sept 1995Marlow - Cookham Upper Main Channel121546
22.5 cm1 Sept 1995Marlow - Cookham Upper Main Channel121546
22.4 cm7 Sept 2009Marlow - Cookham Upper Main Channel118990
22.4 cm1 Sept 2008Cookham Lock Cut114244
22.3 cm1 Sept 2008Cookham Lock Cut114244
22.2 cm2 Sept 2013Marlow - Cookham Upper Main Channel138884
21.9 cm1 Sept 2008Marlow - Cookham Upper Main Channel114247
21.6 cm1 Sept 2008Marlow - Cookham Upper Main Channel114247

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where dace were found

Each point marks a survey location with at least one dace 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 surveyedFirst recordedLast recordedVisits finding dace
Marlow - Cookham Upper Main Channel1 Sept 199527 Jul 202520
Cookham Lock Cut3 Sept 20077 Sept 20093
Marlow Weir Pool1 Sept 199531 Aug 20053
Marlow Sewage Treatment Outfall1 Sept 199831 Aug 20053

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

1995–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 663 measured fish were spread across different length ranges.

Smallest
4.2 cm
Lower quarter
7.3 cm
Median
12.1 cm
Upper quarter
16.6 cm
Largest
23.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Marlow - Cookham

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

Bleak Perch Pike Roach 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 →