RiverFish

Bullhead · Cottus gobio

Bullhead in the Cod Beck

Largest measured bullhead: 9.6 cm

The largest bullhead measured in Environment Agency surveys of the Cod Beck was 9.6 cm, recorded at Broad Beck nr Borrowby on 9 October 2007.

Across 428 measured bullhead, 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 Cod Beck.

See bullhead records across England →

Most recent observation29 September 2022Sutton Beck at Sutton Hall · 16 fish
Largest measured bullhead
9.6 cm
Median length
5.7 cm
Fish measured
428
Survey locations
16

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
9.6 cm9 Oct 2007Broad Beck nr Borrowby107246
9.4 cm8 Jul 2016Cod Beck at Dalton148423
9.3 cm23 Aug 2016Broad Beck nr Borrowby149114
9.2 cm24 Aug 2016Thirkleby Beck at Thirkleby149118
9 cm24 Aug 2016Thirkleby Beck at Thirkleby149118
9 cm8 Jul 2016Cod Beck at Dalton148423
8.9 cm4 Aug 2011Cod Beck at Boville Park129176
8.8 cm12 Sept 2012Cod Beck at Boville Park133496
8.8 cm4 Aug 2011Cod Beck at Boville Park129176
8.5 cm24 Aug 2016Thirkleby Beck at Thirkleby149118

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
Sutton Beck at Sutton Hall1 Jun 200529 Sept 20224
Thirkleby at A1931 May 200515 Sept 20224
Thirkleby Beck at Thirkleby31 May 200515 Sept 20224
Willow Beck at Dalton31 May 200524 Aug 20162
Spital Beck23 Aug 201623 Aug 20161
Cod Beck nr Sowerby (Worlds end Bridge)31 May 200523 Aug 20162
Broad Beck nr Borrowby1 Jun 200523 Aug 20165
Broad Beck at Mill Hill1 Jun 200523 Aug 20165
Oakdale Beck at Thimbleby Hall1 Jun 200512 Aug 20163
Cod Beck at Boville Park31 Aug 200412 Aug 201612
Cod Beck at Dalton25 Jul 20058 Jul 20162
Cod Beck upstream Oak Beck confluence between weir17 Jun 201017 Jun 20101
Cod Beck at watersplash nr Thimbleby Hall1 Jun 200511 Jun 20102
Dalton Beck at Dalton2 Jun 200510 Jun 20102
Cod Beck at Thornton le Beans1 Jun 20051 Jun 20051
Isle Beck at Bruce House31 May 200531 May 20051

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

2004–2022

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 428 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
3.7 cm
Median
5.7 cm
Upper quarter
6.9 cm
Largest
9.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Cod Beck

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

Brown / sea trout Stone loach Minnow Grayling Dace 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 →