RiverFish

Bullhead · Cottus gobio

Bullhead in the River Redlake

Largest measured bullhead: 8 cm

The largest bullhead measured in Environment Agency surveys of the River Redlake was 8 cm, recorded at Bucknell on 11 June 2014.

Across 40 measured bullhead, the median measured length was 5.5 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 Redlake.

See bullhead records across England →

Most recent observation8 May 2025Bucknell (fish rescue)
Largest measured bullhead
8 cm
Median length
5.5 cm
Fish measured
40
Survey locations
5

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 cm11 Jun 2014Bucknell141498
7.2 cm11 Jun 2014Jay141482
7 cm11 Jun 2014Bucknell141498
6.9 cm11 Jun 2014Jay141482
6.6 cm11 Jun 2014Jay141482
6.5 cm11 Jun 2014Bucknell141498
6.4 cm11 Jun 2014Bucknell141498
6.4 cm11 Jun 2014Bucknell141498
6.1 cm11 Jun 2014Jay141482
5.8 cm11 Jun 2014Jay141482

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
Bucknell (fish rescue)19 Jul 20178 May 202519
Bucknell20 May 199315 Sept 20218
Bucknell Bridge13 Sept 201813 Sept 20181
Jay22 Jun 199514 Jul 20167
New Invention22 Jun 199522 Jun 19951

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

1993–2025

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 40 measured fish were spread across different length ranges.

Smallest
2.3 cm
Lower quarter
5 cm
Median
5.5 cm
Upper quarter
5.8 cm
Largest
8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Redlake

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

Brown / sea trout Minnow Stone loach Atlantic salmon 3-spined stickleback European eel

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 →