RiverFish

Bleak · Alburnus alburnus

Bleak in the River Wharfe

Largest measured bleak: 15.2 cm

The largest bleak measured in Environment Agency surveys of the River Wharfe was 15.2 cm, recorded at Tadcaster pre 2006 on 30 June 2005.

Across 64 measured bleak, the median measured length was 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 Wharfe.

See bleak records across England →

Most recent observation20 August 2024Tadcaster post 2006 · 18 fish
Largest measured bleak
15.2 cm
Median length
7 cm
Fish measured
64
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
15.2 cm30 Jun 2005Tadcaster pre 200688096
14.2 cm24 Jun 2014Tadcaster post 2006141548
13.9 cm20 Aug 2024Tadcaster post 2006166388
13.3 cm8 Aug 2006Ulleskelf100797
12.4 cm20 Aug 2024Tadcaster post 2006166388
12.2 cm20 Aug 2024Tadcaster post 2006166388
11.7 cm24 Jun 2014Tadcaster post 2006141548
11.4 cm20 Aug 2024Tadcaster post 2006166388
10.2 cm20 Aug 2024Tadcaster post 2006166388
10.2 cm20 Aug 2024Tadcaster post 2006166388

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
Tadcaster post 200624 Jun 201420 Aug 20242
Ulleskelf28 Jul 199816 Jul 20148
Boston Spa - Fry Survey18 Sept 200718 Sept 20071
Tadcaster pre 200630 Jul 200230 Jun 20052
Ryther20 Jul 200420 Jul 20041

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 bleak that year.

Fish measured by surveyors

Measured length distribution

See how the 64 measured fish were spread across different length ranges.

Smallest
1 cm
Lower quarter
5.9 cm
Median
7 cm
Upper quarter
8.7 cm
Largest
15.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wharfe

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

Minnow Bullhead Stone loach Brown / sea trout European eel 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 →