RiverFish

Dace · Leuciscus leuciscus

Dace in the River Middle Ouse

Largest measured dace: 30.8 cm

The largest dace measured in Environment Agency surveys of the River Middle Ouse was 30.8 cm, recorded at Hartford on 12 October 1989.

Across 3,369 measured dace, the median measured length was 10.4 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 Middle Ouse.

See dace records across England →

Most recent observation22 October 2025Holywell · 51 fish
Largest measured dace
30.8 cm
Median length
10.4 cm
Fish measured
3,369
Survey locations
37

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
30.8 cm12 Oct 1989Hartford29166
23.3 cm12 Oct 1989Hartford29166
22.3 cm28 Sept 1989Portholme Lock29164
21.8 cm26 Oct 1989St Ives29197
21.8 cm12 Oct 1989Hartford29166
21.8 cm12 Oct 1989Hartford29166
21.8 cm12 Oct 1989Hartford29166
21.8 cm4 Oct 1989Houghton29169
21.8 cm4 Oct 1989Houghton29169
21.4 cm27 Sept 2019Portholme Meadow155729

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
Holywell14 Aug 199222 Oct 202513
Hemingford Meadow21 Oct 202521 Oct 20251
Houghton4 Oct 198916 Oct 20257
Portholme Meadow27 Sept 198915 Oct 202517
Pike & Eel8 Nov 198911 Oct 201910
US Dolphin Meadow24 Oct 19892 Oct 201914
St Neots Common14 Aug 19895 Oct 20184
Eynesbury19 Aug 20153 Oct 20182
Kelpie Marina8 Aug 19892 Oct 20186
Longholme24 Jul 19891 Oct 20184
Offord Triangle13 Sept 198921 Aug 20155
Hartford Church29 Sept 198920 Aug 20109
Renhold2 Aug 198924 Sept 20085
Brownshill Pumping Station (Eel Monitoring)2 May 20072 May 20071
Little Paxton18 Aug 19895 Jul 20054
Hemingford Grey23 Oct 198928 Aug 20033
Mow Fen9 Sept 19924 Aug 20034
St Ives26 Oct 198925 Jul 20034
Barford Bridge3 Aug 19891 Oct 20014
Meadow Lane St Ives29 Oct 19903 Aug 19994
Portholme Lock28 Sept 19899 Jul 19993
DS Samual Jones17 Aug 198912 Oct 19983
Offord Intake14 Sept 199814 Sept 19981
Riverside Park11 Aug 19892 Sept 19983
Wyboston Lakes7 Aug 198924 Aug 19983
Blunham4 Aug 198913 Aug 19983
Willington1 Aug 198911 Aug 19983
Bluntisham10 Nov 19892 Oct 19952
Hemingford Abbots5 Oct 198913 Aug 19922
Dolphin Meadow25 Oct 198913 Aug 19922
Houghton Lock3 Oct 198910 Aug 19922
Hartford12 Oct 19897 Aug 19922
Castle Hills Huntingdon2 Oct 19896 Aug 19922
Buckden Marina15 Sept 198916 Jul 19922
Little Paxton Nature Reserve4 Sept 198914 Jul 19922
Cardington Navigation31 Jul 198918 Jun 19922
Brampton25 Sept 198925 Sept 19891

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

1989–2025

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 3,369 measured fish were spread across different length ranges.

Smallest
5 cm
Lower quarter
9.3 cm
Median
10.4 cm
Upper quarter
13 cm
Largest
30.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Middle Ouse

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

Perch Roach Pike Bleak Gudgeon Common bream

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 →