RiverFish

Bullhead · Cottus gobio

Bullhead in the River Crooked Oak

Largest measured bullhead: 7.8 cm

The largest bullhead measured in Environment Agency surveys of the River Crooked Oak was 7.8 cm, recorded at Harpsom Wood (Sp) on 29 August 2018.

Across 119 measured bullhead, the median measured length was 4.6 cm.

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

See bullhead records across England →

Most recent observation6 August 2025Eastwood Farm (Sp) · 29 fish
Largest measured bullhead
7.8 cm
Median length
4.6 cm
Fish measured
119
Survey locations
6

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
7.8 cm29 Aug 2018Harpsom Wood (Sp)153265
7.4 cm29 Aug 2018Harpsom Wood (Sp)153265
7.2 cm5 Jul 2019Ashmill (Te)154727
7.2 cm29 Aug 2018Harpsom Wood (Sp)153265
7.2 cm20 Jun 2018Ashmill (Te)152668
7.2 cm20 Jun 2018Ashmill (Te)152668
7.1 cm5 Jul 2019Ashmill (Te)154727
7.1 cm29 Aug 2018Harpsom Wood (Sp)153265
7 cm30 Aug 2018Eastwood Farm (Sp)153476
7 cm29 Aug 2018Harpsom Wood (Sp)153265

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
Eastwood Farm (Sp)21 Aug 19966 Aug 20257
Yeo Bridge (Sp)19 Aug 199628 Jul 20254
Harpsom Wood (Sp)19 Aug 199628 Jul 20256
Ashmill (Te)19 Aug 199626 Jun 202520
Alswear (Sp)*21 Aug 19963 Sept 19992
Owlaborough (Sp)*26 Aug 199926 Aug 19991

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

1996–2025

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 119 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
3.2 cm
Median
4.6 cm
Upper quarter
6 cm
Largest
7.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Crooked Oak

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

Brown / sea trout Atlantic salmon Stone loach European eel Minnow

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 →