RiverFish

Dace · Leuciscus leuciscus

Dace in the River Colne

Largest measured dace: 33.5 cm

The largest dace measured in Environment Agency surveys of the River Colne was 33.5 cm, recorded at Maplestead Mill on 8 September 1987.

Across 9,814 measured dace, the median measured length was 13.4 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 Colne.

See dace records across England →

Most recent observation16 June 2026Blue Bridge · 10 fish
Largest measured dace
33.5 cm
Median length
13.4 cm
Fish measured
9,814
Survey locations
30

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
33.5 cm8 Sept 1987Maplestead Mill13918
30 cm23 Sept 1987Blue Bridge13914
29.6 cm15 May 2014Wakes Colne Viaduct141108
29.1 cm23 Sept 1987Blue Bridge13914
29 cm31 Aug 1990Earls Colne FGS13938
29 cm17 Apr 1984Chalkney Mill13887
29 cm13 Apr 1984Earls Colne FGS13889
28.9 cm12 Apr 1984Blue Bridge13890
28.6 cm1 Sept 1993Earls Colne FGS13963
28.5 cm24 Aug 1990Swanscombe Farm13935

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
Blue Bridge12 Apr 198416 Jun 202612
Brook Street Farm10 Sept 198710 Jun 202611
Box Mill11 Apr 19843 Jun 202612
Wakes Colne Viaduct14 Aug 19872 Jun 202620
Fordstreet11 May 198414 May 202614
Spring Lane16 May 19847 May 202617
Earls Colne FGS13 Apr 19846 May 202621
Downstream New Bridge17 May 19848 Jun 202311
Chalkney Mill17 Apr 19842 Jun 202310
Cooks Mill18 May 198424 May 201710
Maplestead Mill10 Apr 198411 Jun 201410
The Hedinghams16 Jun 199910 Jun 20143
Nunnery Bridge4 May 19849 Jun 20144
Broom House14 May 19842 May 201411
Cricket Ground28 Jul 198730 Apr 20148
Lexden FGS Upstream (Silver eel)1 Dec 20115 Jan 20122
North Bridge29 Jul 198712 May 20119
Swanscombe Farm18 Apr 198418 Jun 20089
Halstead24 Sept 198710 Jun 20085
Elms Hall20 Aug 19875 Jun 20087
Fiddlers Mill11 Aug 19872 Jun 20087
Upstream A12 Bridge21 May 198413 May 20089
Bathing Pool22 May 19849 May 20086
Alderford Mill21 May 199629 Jun 20052
Earls Colne Mill16 Apr 19843 Jun 20054
Castle Park23 May 19846 Apr 19994
Great Porters Farm22 Sept 199322 Sept 19931
Upstream Blue Bridge17 Sept 199016 Sept 19932
Does Corner19 Sept 199019 Sept 19901
Poole Street28 Sept 198728 Sept 19871

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

1984–2026

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 9,814 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
9.7 cm
Median
13.4 cm
Upper quarter
17.2 cm
Largest
33.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Colne

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

Roach European eel Gudgeon Pike Perch Stone loach

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 →