RiverFish

Bullhead · Cottus gobio

Bullhead in the Bourn Brook

Largest measured bullhead: 9.3 cm

The largest bullhead measured in Environment Agency surveys of the Bourn Brook was 9.3 cm, recorded at Westfield Farm on 3 November 1993.

Across 69 measured bullhead, the median measured length was 5.6 cm.

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

See bullhead records across England →

Most recent observation6 March 2025Westfield Farm · 18 fish
Largest measured bullhead
9.3 cm
Median length
5.6 cm
Fish measured
69
Survey locations
3

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
9.3 cm3 Nov 1993Westfield Farm29327
9.2 cm11 Jun 2013Westfield Farm136320
8.3 cm6 Mar 2025Westfield Farm175911
8.3 cm30 May 2013Cantelupe Farm Bourn Brook136134
8.1 cm11 Jun 2013Westfield Farm136320
8 cm6 Mar 2025Westfield Farm175911
7.8 cm11 Jun 2013Westfield Farm136320
7.6 cm30 May 2013Cantelupe Farm Bourn Brook136134
7.5 cm6 Mar 2025Westfield Farm175911
7.4 cm11 Jun 2013Westfield Farm136320

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
Westfield Farm3 Nov 19936 Mar 20256
Cantelupe Farm Bourn Brook8 Feb 200530 May 20133
Barton Bridge13 Feb 199713 Feb 19971

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

1993–2025

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 69 measured fish were spread across different length ranges.

Smallest
3.4 cm
Lower quarter
4.6 cm
Median
5.6 cm
Upper quarter
6.7 cm
Largest
9.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bourn Brook

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

Pike Roach Dace Perch Minnow 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 →