Dace · Leuciscus leuciscus

Dace in the Wraysbury River

Largest measured dace: 27.1 cm

The largest dace measured in Environment Agency surveys of the Wraysbury River was 27.1 cm, recorded at Harmondsworth Moor on 18 June 2015.

Across 346 measured dace, the median measured length was 14.1 cm.

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

See dace records across England →

Most recent observation15 May 2024Harmondsworth Moor · 9 fish

Largest measured dace: 27.1 cm
Median length: 14.1 cm
Fish measured: 346
Survey locations: 3

Individual EA measurements

Largest measured dace

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
27.1 cm	18 Jun 2015	Harmondsworth Moor	144973
24.2 cm	18 Jun 2015	Harmondsworth Moor	144973
23.6 cm	5 Jun 2014	Harmondsworth Moor	141014
23.5 cm	4 Aug 2004	Harmondsworth Moor	80906
23.3 cm	3 Sept 2003	Harmondsworth Moor	76923
23.2 cm	3 Sept 2003	Harmondsworth Moor	76923
23.1 cm	3 Jun 2013	Harmondsworth Moor	136267
22 cm	22 Oct 2019	Heathrow Wraysbury River Zone H	155852
21.8 cm	24 Jun 2008	Harmondsworth Moor	111536
21.3 cm	3 Jun 2013	Harmondsworth Moor	136267

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 surveyed	First recorded	Last recorded	Visits finding dace
Harmondsworth Moor	3 Sept 2003	15 May 2024	16
Heathrow Wraysbury River Zone H	22 Oct 2019	22 Oct 2019	1
Heathrow Wraysbury River Zone F	22 Oct 2019	22 Oct 2019	1

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

2003–2024

Survey records by year

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

103

104

105

106

107

108

109

110

111

112

113

114

115

016

017

118

219

020

021

022

123

124

Fish measured by surveyors

Measured length distribution

See how the 346 measured fish were spread across different length ranges.

Smallest: 3.8 cm
Lower quarter: 11.5 cm
Median: 14.1 cm
Upper quarter: 16.5 cm
Largest: 27.1 cm

0–99 mm

100–199 mm

261

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Wraysbury River

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

Chub Gudgeon Minnow Perch Bullhead Pike

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 →