RiverFish

Bullhead · Cottus gobio

Bullhead in the River Porter

Largest measured bullhead: 11.8 cm

The largest bullhead measured in Environment Agency surveys of the River Porter was 11.8 cm, recorded at Downstream Forge Dam on 30 August 2005.

Across 209 measured bullhead, the median measured length was 7 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 Porter.

See bullhead records across England →

Most recent observation11 September 2025Endcliffe Park Depleted Reach
Largest measured bullhead
11.8 cm
Median length
7 cm
Fish measured
209
Survey locations
6

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
11.8 cm30 Aug 2005Downstream Forge Dam87772
11.3 cm30 Aug 2005Downstream Forge Dam87772
11.1 cm13 Sept 2017Downstream Forge Dam151773
11.1 cm15 Sept 2011Downstream Forge Dam129018
11 cm30 Aug 2005Downstream Forge Dam87772
10.8 cm13 Sept 2017Downstream Forge Dam151773
10.8 cm13 Sept 2017Downstream Forge Dam151773
10.7 cm13 Sept 2017Downstream Forge Dam151773
10.5 cm13 Sept 2017Downstream Forge Dam151773
10.4 cm13 Sept 2017Downstream Forge Dam151773

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
Endcliffe Park Upstream Depleted11 Sept 202511 Sept 20251
Endcliffe Park Downstream Depleted11 Sept 202511 Sept 20251
Endcliffe Park Depleted Reach11 Sept 202511 Sept 20251
Endcliffe Park19 Nov 199319 Sept 20235
Downstream Forge Dam5 Oct 199319 Sept 20235
Sheffield22 Jan 198622 Jan 19861

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

1986–2025

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 209 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
4.5 cm
Median
7 cm
Upper quarter
8.5 cm
Largest
11.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Porter

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

Brown / sea trout 3-spined stickleback

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 →