RiverFish

Dace · Leuciscus leuciscus

Dace in the River Ouse

Largest measured dace: 26.2 cm

The largest dace measured in Environment Agency surveys of the River Ouse was 26.2 cm, recorded at East Mascalls Bridge on 25 August 2015.

Across 2,767 measured dace, the median measured length was 11.4 cm.

Surveyors recorded weights for 1,309 dace. The median was 0.7 oz (0.02 kg) and the largest recorded weight was 7.9 oz (0.224 kg).

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

See dace records across England →

Most recent observation25 July 2024Fletching Mill Upstream · 15 fish
Largest measured dace
26.2 cm
Median length
11.4 cm
Fish measured
2,767
Survey locations
16

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
26.2 cm25 Aug 2015East Mascalls Bridge146092
26 cm18 Sept 2017East Mascalls Bridge151678
25.4 cm29 Sept 2015Fletching Mill Upstream146838
24.9 cm25 Aug 2015East Mascalls Bridge146092
24.5 cm12 Sept 2023East Mascalls Bridge163704
24.5 cm11 Sept 2017Fletching Mill Upstream151626
24.4 cm29 Sept 2015Fletching Mill Upstream146838
24.4 cm17 Aug 2004Avins Bridge81340
24.2 cm11 Sept 2017Fletching Mill Upstream151626
24.2 cm30 Aug 2006East Mascalls Bridge102374

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
Sheffield Bridge29 Aug 200125 Jul 202415
Fletching Mill Upstream20 Sept 200925 Jul 20247
Sloop13 Aug 200124 Jul 202415
East Mascalls Bridge10 Aug 200124 Jul 202416
Barcombe Mills25 Sept 200328 Sept 20233
Isfield Church2 Oct 200327 Sept 20238
Anchor Weir7 Sept 201129 Jun 20162
Newick9 Oct 200314 Sept 201510
Upstream Lindfield Bridge24 Oct 201224 Oct 20121
Sutton Hall Weir Downstream26 Oct 201126 Oct 20111
Sloop Weir Upstream25 Oct 201125 Oct 20111
Sloop Weir Downstream25 Oct 201125 Oct 20111
Fletching Mill Downstream28 Oct 200911 Jul 20113
Sharpsbridge8 Aug 200229 Oct 20097
Avins Bridge9 Aug 20017 Sept 20076
Ardingly College6 Jul 199823 Sept 20032

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

1998–2024

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 2,767 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
7.5 cm
Median
11.4 cm
Upper quarter
16.2 cm
Largest
26.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 1,309 dace. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
0.1 oz (0.004 kg)
Median
0.7 oz (0.02 kg)
Upper quarter
1.9 oz (0.054 kg)
Heaviest
7.9 oz (0.224 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Ouse

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

European eel Perch Roach Gudgeon Stone loach Chub

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 →