RiverFish

Bullhead · Cottus gobio

Bullhead in the River Devon

Largest measured bullhead: 11.5 cm

The largest bullhead measured in Environment Agency surveys of the River Devon was 11.5 cm, recorded at Cottam Gauging Station on 8 May 2013.

Across 227 measured bullhead, the median measured length was 6.9 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 Devon.

See bullhead records across England →

Most recent observation6 August 2025Cottam Gauging Station
Largest measured bullhead
11.5 cm
Median length
6.9 cm
Fish measured
227
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
11.5 cm8 May 2013Cottam Gauging Station136054
11.5 cm8 May 2013Cottam Gauging Station136054
11 cm12 Jun 2013Bottesford137239
11 cm8 May 2013Cottam Gauging Station136054
10.6 cm12 Jun 2013Bottesford137239
10.5 cm2 Jun 2015Cottam Gauging Station145263
10.5 cm8 May 2013Cottam Gauging Station136054
10.4 cm12 Jun 2013Bottesford137239
10.2 cm24 May 2011Cottam Gauging Station126326
10.1 cm2 Jun 2015Cottam Gauging Station145263

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
Cottam Gauging Station5 May 19956 Aug 20257
Staunton in the Vale24 May 201121 Jun 20172
Bottesford12 Jun 201321 Jun 20172
Grange Farm2 Sept 20112 Sept 20111
Hawton19 Feb 199828 Aug 20092

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

1995–2025

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 227 measured fish were spread across different length ranges.

Smallest
1.6 cm
Lower quarter
5.9 cm
Median
6.9 cm
Upper quarter
8.1 cm
Largest
11.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Devon

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

Roach European eel 3-spined stickleback Stone loach Perch Chub

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 →