RiverFish

Bleak · Alburnus alburnus

Bleak in the River Nidd

Largest measured bleak: 16.2 cm

The largest bleak measured in Environment Agency surveys of the River Nidd was 16.2 cm, recorded at Nun Monkton on 20 June 2013.

Across 1,164 measured bleak, the median measured length was 5.7 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 Nidd.

See bleak records across England →

Most recent observation13 August 2025Kirk Hammerton - Fry Survey · 12 fish
Largest measured bleak
16.2 cm
Median length
5.7 cm
Fish measured
1,164
Survey locations
7

Individual EA measurements

Largest measured bleak

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
16.2 cm20 Jun 2013Nun Monkton136530
16.1 cm18 Jul 2014Nun Monkton141763
15.6 cm24 Jun 2016Nun Monkton148269
15.6 cm12 Jul 2010Kirk Hammerton122956
15.5 cm20 Jun 2013Kirk Hammerton136532
15.5 cm20 Jun 2013Kirk Hammerton136532
14.8 cm4 Jul 2011Nun Monkton128684
14.7 cm23 Jun 2016Kirk Hammerton148270
14.7 cm20 Jun 2013Nun Monkton136530
14.6 cm29 Jun 2015Cowthorpe145308

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where bleak were found

Each point marks a survey location with at least one bleak 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 bleak
Kirk Hammerton - Fry Survey24 Sept 198513 Aug 202516
Moor Monkton27 Jun 202217 Jul 20252
Skip Bridge22 Jun 202223 Jun 20253
Cowthorpe20 Jun 201327 Jun 20247
Nun Monkton21 Aug 200222 Jul 201914
Kirk Hammerton21 Aug 200223 Jun 201613
Ribston Park22 Aug 200722 Aug 20071

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

1985–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 1,164 measured fish were spread across different length ranges.

Smallest
1.2 cm
Lower quarter
2.8 cm
Median
5.7 cm
Upper quarter
9.9 cm
Largest
16.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nidd

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

Minnow Bullhead Stone loach Grayling Brown / sea trout European eel

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 →