RiverFish

Bullhead · Cottus gobio

Bullhead in the River Laver

Largest measured bullhead: 10.1 cm

The largest bullhead measured in Environment Agency surveys of the River Laver was 10.1 cm, recorded at River Laver (Winskley) on 17 August 2011.

Across 356 measured bullhead, the median measured length was 5.8 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 Laver.

See bullhead records across England →

Most recent observation25 September 2025River Laver (Winskley)
Largest measured bullhead
10.1 cm
Median length
5.8 cm
Fish measured
356
Survey locations
8

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
10.1 cm17 Aug 2011River Laver (Winskley)129158
9.6 cm20 Aug 2015R.Laver, Clotherholme Farm150059
9.5 cm29 Jul 2021River Laver (Winskley)160020
9.5 cm2 Aug 2013u/s Ripon FAS137942
9.3 cm21 Sept 2015d/s Ripon FAS150051
9.3 cm13 Jun 2007Carlesmoor Beck at Hedge Nook105673
9.1 cm29 Aug 2017River Laver (Winskley)151461
9 cm17 Aug 2011River Laver (Winskley)129158
8.9 cm29 Jul 2021River Laver (Winskley)160020
8.9 cm1 Aug 2013Carlesmoor Beck at Hedge Nook137931

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
River Laver The Secret Garden29 Sept 202325 Sept 20252
River Laver (Winskley)12 Sept 200225 Sept 202516
River Laver, Laverton7 Jun 200722 Sept 20253
Carlesmoor Beck at Hedge Nook13 Jun 200722 Sept 20253
R.Laver, Clotherholme Farm7 Jun 200728 Aug 20243
d/s Ripon FAS2 Aug 201321 Sept 20152
u/s Ripon FAS2 Aug 20132 Aug 20131
R.Laver, Low Grantley13 Jun 200713 Jun 20071

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

2002–2025

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 356 measured fish were spread across different length ranges.

Smallest
1.8 cm
Lower quarter
3.8 cm
Median
5.8 cm
Upper quarter
6.9 cm
Largest
10.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Laver

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

Brown / sea trout 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 →