RiverFish

Bullhead · Cottus gobio

Bullhead in the Great Eau FMU

Largest measured bullhead: 15.2 cm

The largest bullhead measured in Environment Agency surveys of the Great Eau FMU was 15.2 cm, recorded at Claythorpe Gauging Station on 7 April 1992.

Across 159 measured bullhead, the median measured length was 7.4 cm.

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

See bullhead records across England →

Most recent observation18 July 2024Belleau Spring
Largest measured bullhead
15.2 cm
Median length
7.4 cm
Fish measured
159
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
15.2 cm7 Apr 1992Claythorpe Gauging Station57781
12 cm7 Apr 1992Claythorpe Gauging Station57781
11.4 cm19 Apr 1995Claythorpe Gauging Station57795
11.4 cm11 Apr 1995Belleau Spring57793
11.4 cm19 Jul 1994Claythorpe Gauging Station58076
11.3 cm7 Apr 1992Claythorpe Gauging Station57781
11.3 cm7 Apr 1992Claythorpe Gauging Station57781
11.2 cm29 Sept 1995Claythorpe Gauging Station58101
11.2 cm19 Apr 1995Claythorpe Gauging Station57795
11 cm7 Apr 1992Claythorpe Gauging Station57781

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
Belleau Spring18 Aug 198618 Jul 202410
Claythorpe Gauging Station7 Apr 19921 Jun 20227
DS Claythorpe Mill30 May 201830 May 20181
Woods Farm18 Aug 198619 Jun 20157
Gayton Engine17 Apr 200317 Apr 20031

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

1986–2024

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 159 measured fish were spread across different length ranges.

Smallest
3.9 cm
Lower quarter
6 cm
Median
7.4 cm
Upper quarter
8.7 cm
Largest
15.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Great Eau FMU

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

European eel 3-spined stickleback Stone loach Roach Pike Dace

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 →