RiverFish

Bleak · Alburnus alburnus

Bleak in the River Swale

Largest measured bleak: 15.3 cm

The largest bleak measured in Environment Agency surveys of the River Swale was 15.3 cm, recorded at Myton Grange on 1 August 2007.

Across 580 measured bleak, the median measured length was 3 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 Swale.

See bleak records across England →

Most recent observation24 July 2025Myton Grange · 3 fish
Largest measured bleak
15.3 cm
Median length
3 cm
Fish measured
580
Survey locations
5

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
15.3 cm1 Aug 2007Myton Grange106464
15.3 cm31 Jul 2006Myton Grange101065
15 cm6 Jul 2016Myton Grange148426
14.4 cm6 Jul 2016Myton Grange148426
14.3 cm8 Sept 2004Myton Grange82074
13.1 cm15 Aug 2002Myton Grange55023
12.8 cm1 Aug 2007Myton Grange106464
12.7 cm1 Aug 2007Myton Grange106464
12.7 cm8 Sept 2004Myton Grange82074
12.6 cm15 Aug 2002Myton Grange55023

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
Myton Grange15 Aug 200224 Jul 20257
Brafferton1 Aug 199622 Jul 20243
Thornton Bridge - Fry Survey20 Sept 198420 Sept 200715
Fawdington21 Jul 200521 Jul 20051
Holme25 Jun 199625 Jun 19961

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

1984–2025

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 580 measured fish were spread across different length ranges.

Smallest
1.5 cm
Lower quarter
2.5 cm
Median
3 cm
Upper quarter
5.7 cm
Largest
15.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Swale

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

Minnow Chub Bullhead Stone loach Dace Grayling

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 →