Bullhead · Cottus gobio

Bullhead in the River Portholland

Largest measured bullhead: 8.9 cm

The largest bullhead measured in Environment Agency surveys of the River Portholland was 8.9 cm, recorded at Pencoose on 29 September 1998.

Across 82 measured bullhead, the median measured length was 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 Portholland.

See bullhead records across England →

Most recent observation29 September 1998Pencoose · 20 fish

Largest measured bullhead: 8.9 cm
Median length: 5 cm
Fish measured: 82
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.

Length	Survey date	Survey location	Survey ID
8.9 cm	29 Sept 1998	Pencoose	126477
8.7 cm	28 Sept 1998	Portholland	126481
8.3 cm	29 Sept 1998	Pencoose	126477
8 cm	29 Sept 1998	Pencoose	126477
7.9 cm	28 Sept 1998	Trelucky Mill	126474
7.5 cm	29 Sept 1998	Pencoose	126477
7.4 cm	28 Sept 1998	Trelucky Mill	126474
7.3 cm	28 Sept 1998	Trelucky Mill	126474
7.3 cm	28 Sept 1998	Trelucky Mill	126474
7.2 cm	28 Sept 1998	Portholland	126481

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 surveyed	First recorded	Last recorded	Visits finding bullhead
Pencoose	3 Jun 1986	29 Sept 1998	4
Trelucky Mill	3 Jun 1986	28 Sept 1998	4
Portholland	3 Jun 1986	28 Sept 1998	4

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

1986–1998

Survey records by year

Each bar shows how many survey visits recorded bullhead that year.

386

087

088

089

090

091

392

093

094

395

096

097

398

Fish measured by surveyors

Measured length distribution

See how the 82 measured fish were spread across different length ranges.

Smallest: 2.6 cm
Lower quarter: 4 cm
Median: 5.1 cm
Upper quarter: 6.7 cm
Largest: 8.9 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Portholland

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

European eel 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 →