RiverFish

Bullhead · Cottus gobio

Bullhead in the Roman River (Main Reaches)

Largest measured bullhead: 10.8 cm

The largest bullhead measured in Environment Agency surveys of the Roman River (Main Reaches) was 10.8 cm, recorded at Bounstead FGS on 12 September 2024.

Across 344 measured bullhead, the median measured length was 5.2 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Roman River (Main Reaches).

See bullhead records across England →

Most recent observation12 October 2025Bounstead FGS · 144 fish
Largest measured bullhead
10.8 cm
Median length
5.2 cm
Fish measured
344
Survey locations
3

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
10.8 cm12 Sept 2024Bounstead FGS168775
10 cm4 Jun 1996Park Farm14693
9.3 cm21 Oct 2011Park Farm128846
9.1 cm21 Nov 2005Park Farm88014
8.6 cm12 Sept 2024Bounstead FGS168775
8.6 cm12 Sept 2024Bounstead FGS168775
8.3 cm12 Oct 2025Bounstead FGS179392
8.3 cm12 Sept 2024Bounstead FGS168775
8.3 cm17 Oct 2017Bounstead FGS152380
8.2 cm12 Oct 2025Bounstead FGS179392

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
Bounstead FGS28 Jun 199912 Oct 20259
Upstream Layer Mill16 Oct 201716 Oct 20171
Park Farm4 Jun 199621 Oct 20113

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

1996–2025

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 344 measured fish were spread across different length ranges.

Smallest
3.2 cm
Lower quarter
4.7 cm
Median
5.2 cm
Upper quarter
6.1 cm
Largest
10.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Roman River (Main Reaches)

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

European eel Roach Stone loach Dace Gudgeon Brown / sea trout

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 →