RiverFish

Dace · Leuciscus leuciscus

Dace in the River Old Windsor

Largest measured dace: 14.1 cm

The largest dace measured in Environment Agency surveys of the River Old Windsor was 14.1 cm, recorded at Old Windsor Downstream Fry on 25 August 2016.

Across 1,805 measured dace, the median measured length was 5.1 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 Old Windsor.

See dace records across England →

Most recent observation3 September 2025Old Windsor Upstream Fry · 109 fish
Largest measured dace
14.1 cm
Median length
5.1 cm
Fish measured
1,805
Survey locations
2

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
14.1 cm25 Aug 2016Old Windsor Downstream Fry149234
13.5 cm21 Aug 2018Old Windsor Upstream Fry153459
12.6 cm21 Aug 2007Old Windsor Upstream Fry108618
12.2 cm21 Aug 2018Old Windsor Upstream Fry153459
12 cm21 Aug 2018Old Windsor Upstream Fry153459
12 cm21 Aug 2018Old Windsor Upstream Fry153459
11.9 cm21 Aug 2018Old Windsor Upstream Fry153459
11.8 cm21 Aug 2018Old Windsor Upstream Fry153459
11.8 cm20 Aug 2008Old Windsor Upstream Fry125708
11.7 cm20 Aug 2008Old Windsor Upstream Fry125708

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
Old Windsor Upstream Fry9 Sept 20043 Sept 202515
Old Windsor Downstream Fry9 Sept 20043 Sept 202517

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

2004–2025

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 1,805 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
4.4 cm
Median
5.1 cm
Upper quarter
5.9 cm
Largest
14.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Old Windsor

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

Gudgeon Chub Roach Minnow Bleak 3-spined stickleback

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 →