RiverFish

Bullhead · Cottus gobio

Bullhead in the Muker Beck

Largest measured bullhead: 10 cm

The largest bullhead measured in Environment Agency surveys of the Muker Beck was 10 cm, recorded at Straw Beck West of Muker on 2 August 2016.

Across 249 measured bullhead, the median measured length was 6.6 cm.

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

See bullhead records across England →

Most recent observation4 September 2024Straw Beck West of Muker
Largest measured bullhead
10 cm
Median length
6.6 cm
Fish measured
249
Survey locations
4

Individual EA measurements

Largest measured bullhead

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

LengthSurvey dateSurvey locationSurvey ID
10 cm2 Aug 2016Straw Beck West of Muker148894
9.8 cm22 Sept 2014Straw Beck West of Muker142945
9.7 cm2 Aug 2016Straw Beck West of Muker148894
9.7 cm2 Sept 2013Straw Beck West of Muker138475
9.7 cm14 Aug 2012Straw Beck West of Muker133134
9.6 cm22 Sept 2014Straw Beck West of Muker142945
9.6 cm22 Sept 2014Straw Beck West of Muker142945
9.6 cm22 Sept 2014Straw Beck West of Muker142945
9.6 cm1 Aug 2011Straw Beck West of Muker129179
9.5 cm22 Sept 2014Straw Beck West of Muker142945

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

Explore the river

Where bullhead were found

Each point marks a survey location with at least one bullhead 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 bullhead
Straw Beck West of Muker29 Aug 20024 Sept 202416
Thwaite Beck at Thwaite Bridge6 Jun 200514 Sept 20223
Skeb Skeugh nr Thorns Farm6 Jun 200512 Sept 20223
Skeb Skeugh nr Thwaite7 Jun 20057 Jun 20051

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

2002–2024

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 249 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
5.3 cm
Median
6.6 cm
Upper quarter
7.8 cm
Largest
10 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Muker Beck

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

Brown / sea trout Stone loach

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 →