Bullhead · Cottus gobio

Bullhead in the Sea Trout Survey, Doniford Stream

Largest measured bullhead: 8 cm

The largest bullhead measured in Environment Agency surveys of the Sea Trout Survey, Doniford Stream was 8 cm, recorded at Adjacent to Sewage Treatment Works on 18 September 2019.

Across 8 measured bullhead, the median measured length was 6 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Sea Trout Survey, Doniford Stream.

See bullhead records across England →

Most recent observation18 September 2019Adjacent to Sewage Treatment Works · 8 fish

Largest measured bullhead: 8 cm
Median length: 6 cm
Fish measured: 8
Survey locations: 4

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 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
7.1 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
6.4 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
6.1 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
5.8 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
5.5 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
4.9 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395
4 cm	18 Sept 2019	Adjacent to Sewage Treatment Works	155395

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
Adjacent to Sewage Treatment Works	13 Oct 2006	18 Sept 2019	3
Swill Bridge	13 Oct 2006	13 Oct 2006	1
Spill End	18 Oct 2005	13 Oct 2006	2
High Bridge, Williton	13 Oct 2006	13 Oct 2006	1

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

2005–2019

Survey records by year

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

105

406

007

008

009

010

111

012

013

014

015

016

017

018

119

Fish measured by surveyors

Measured length distribution

See how the 8 measured fish were spread across different length ranges.

Smallest: 4 cm
Lower quarter: 5.4 cm
Median: 6 cm
Upper quarter: 6.6 cm
Largest: 8 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Sea Trout Survey, Doniford Stream

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

Brown / sea trout European eel Minnow

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 →