RiverFish

Bullhead · Cottus gobio

Bullhead in the River Glen Downstream Confluence

Largest measured bullhead: 9.7 cm

The largest bullhead measured in Environment Agency surveys of the River Glen Downstream Confluence was 9.7 cm, recorded at Upstream Kates Bridge on 3 September 2024.

Across 52 measured bullhead, the median measured length was 6.3 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 Glen Downstream Confluence.

See bullhead records across England →

Most recent observation26 June 2025Upstream Kates Bridge · 4 fish
Largest measured bullhead
9.7 cm
Median length
6.3 cm
Fish measured
52
Survey locations
4

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
9.7 cm3 Sept 2024Upstream Kates Bridge167151
9.3 cm3 Sept 2024Upstream Kates Bridge167151
9 cm11 Mar 1994Wilsthorpe54351
8.9 cm26 Jun 2025Upstream Kates Bridge177171
8.6 cm3 Sept 2024Upstream Kates Bridge167151
8.4 cm3 Sept 2024Upstream Kates Bridge167151
8 cm3 Sept 2024Upstream Kates Bridge167151
8 cm3 Sept 2024Upstream Kates Bridge167151
7.7 cm3 Sept 2024Upstream Kates Bridge167151
7.5 cm3 Sept 2024Upstream Kates Bridge167151

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
Upstream Kates Bridge5 May 201026 Jun 20253
Downstream Kates Bridge12 Jul 199420 Jul 20236
Wilsthorpe11 Mar 199419 Jul 20238
Downstream Fletland Mill3 Jun 200923 Mar 20162

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

1994–2025

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 52 measured fish were spread across different length ranges.

Smallest
3.4 cm
Lower quarter
5.5 cm
Median
6.4 cm
Upper quarter
7.1 cm
Largest
9.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Glen Downstream Confluence

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

Pike European eel Minnow Chub Dace Perch

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 →