RiverFish

Bullhead · Cottus gobio

Bullhead in the River Hamble

Largest measured bullhead: 7.3 cm

The largest bullhead measured in Environment Agency surveys of the River Hamble was 7.3 cm, recorded at Brooklands Farm on 21 July 2008.

Across 204 measured bullhead, the median measured length was 5 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 Hamble.

See bullhead records across England →

Most recent observation18 June 2025Durley Mill · 56 fish
Largest measured bullhead
7.3 cm
Median length
5 cm
Fish measured
204
Survey locations
9

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
7.3 cm21 Jul 2008Brooklands Farm113128
7.2 cm21 Jul 2008Brooklands Farm113128
7.2 cm12 Jun 2008Thickets Farm113738
7.1 cm21 Jul 2008Brooklands Farm113128
7 cm12 Jun 2008Thickets Farm113738
6.8 cm12 Jun 2008Thickets Farm113738
6.8 cm12 Jun 2008Thickets Farm113738
6.8 cm12 Jun 2008Thickets Farm113738
6.7 cm22 Jul 2010Lower Wangfield Farm Meadow123889
6.6 cm21 Jul 2008Brooklands Farm113128

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
Durley Mill14 Aug 200118 Jun 20256
Lower Wangfield Farm Meadow29 May 20079 Jul 20248
Frog Mill27 Aug 20025 Aug 20214
Tangier Farm21 Jul 20082 Aug 20213
Brooklands Farm21 Jul 20082 Aug 20213
Upstream of railway viaduct11 Jun 200822 Aug 20184
Treefield14 Jul 201614 Jul 20161
Thickets Farm12 Jun 200814 Jul 20162
Wangfield Lane29 May 200729 May 20071

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

2001–2025

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 204 measured fish were spread across different length ranges.

Smallest
1.3 cm
Lower quarter
2.8 cm
Median
5 cm
Upper quarter
5.7 cm
Largest
7.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Hamble

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

Brown / sea trout European eel Grayling Brook lamprey Roach 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 →