RiverFish

Bullhead · Cottus gobio

Bullhead in the River Blackwater (Yare)

Largest measured bullhead: 10.2 cm

The largest bullhead measured in Environment Agency surveys of the River Blackwater (Yare) was 10.2 cm, recorded at Cranworth, Gurdon Plantation bridleway on 27 November 2006.

Across 1,009 measured bullhead, the median measured length was 4.7 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 Blackwater (Yare).

See bullhead records across England →

Most recent observation2 December 2014Hardingham Grove · 98 fish
Largest measured bullhead
10.2 cm
Median length
4.7 cm
Fish measured
1,009
Survey locations
7

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
10.2 cm27 Nov 2006Cranworth, Gurdon Plantation bridleway103190
9.4 cm11 Jan 2012Thuxton, d/s Railway Bridge130106
9.1 cm28 Nov 2006Southburgh, d/s White Bridge103203
8.7 cm23 Nov 2006Garvestone, Tanners Lane Ford103276
8.5 cm13 Jan 2012Reymerston, Bridge Farm130104
8.4 cm11 Jan 2012Southburgh, d/s White Bridge130098
8.3 cm13 Jan 2012Reymerston, Bridge Farm130104
8.3 cm27 Nov 2006Cranworth, Gurdon Plantation bridleway103190
8.2 cm2 Feb 2012Garvestone, Tanners Lane Ford130118
8.2 cm9 Jan 2012Cranworth, Gurdon Plantation bridleway130099

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
Hardingham Grove1 Dec 20062 Dec 20142
Garvestone, Tanners Lane Ford23 Nov 20062 Feb 20122
Reymerston, Bridge Farm27 Nov 200613 Jan 20122
Thuxton, d/s Railway Bridge1 Dec 200611 Jan 20122
Southburgh, d/s White Bridge28 Nov 200611 Jan 20122
Shipdham, Hall Farm24 Nov 20069 Jan 20122
Cranworth, Gurdon Plantation bridleway27 Nov 20069 Jan 20122

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

2006–2014

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 1,009 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
4 cm
Median
4.7 cm
Upper quarter
5.5 cm
Largest
10.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Blackwater (Yare)

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

3-spined stickleback Stone loach 10-spined stickleback Dace

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 →