RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main Stannon

Largest measured bullhead: 8 cm

The largest bullhead measured in Environment Agency surveys of the River Main Stannon was 8 cm, recorded at Stannon on 15 August 2017.

Across 344 measured bullhead, the median measured length was 3.6 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 Main Stannon.

See bullhead records across England →

Most recent observation9 August 2023Stannon · 117 fish
Largest measured bullhead
8 cm
Median length
3.6 cm
Fish measured
344
Survey locations
2

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
8 cm15 Aug 2017Stannon151240
7.6 cm15 Aug 2017Stannon151240
7.6 cm25 Jul 2011Stannon127190
7.5 cm21 Aug 2019Stannon155618
7.5 cm15 Aug 2017Stannon151240
7.4 cm9 Aug 2023Stannon163058
7.3 cm21 Sept 2021Stannon160668
7.3 cm21 Sept 2021Stannon160668
7.3 cm21 Aug 2019Stannon155618
7.2 cm9 Aug 2023Stannon163058

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
Stannon15 Jul 19859 Aug 202313
u/s Allens Ford7 Aug 199714 Aug 20062

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

1985–2023

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 344 measured fish were spread across different length ranges.

Smallest
1.8 cm
Lower quarter
2.8 cm
Median
3.6 cm
Upper quarter
5.7 cm
Largest
8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Stannon

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

Brown / sea trout European eel Atlantic salmon 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 →