Bullhead · Cottus gobio

Bullhead in the Main Doniford Stream

Largest measured bullhead: 9.7 cm

The largest bullhead measured in Environment Agency surveys of the Main Doniford Stream was 9.7 cm, recorded at Kingswood on 21 September 1994.

Across 317 measured bullhead, the median measured length was 5.8 cm.

Surveyors recorded weights for 66 bullhead. The median was 0.1 oz (0.004 kg) and the largest recorded weight was 0.5 oz (0.014 kg).

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

See bullhead records across England →

Most recent observation19 September 2019Maggies Field (Se-05) · 422 fish

Largest measured bullhead: 9.7 cm
Median length: 5.8 cm
Fish measured: 317
Survey locations: 7

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
9.7 cm	21 Sept 1994	Kingswood	79762
9.5 cm	8 Oct 2013	Bee Farm	139304
9.5 cm	13 Sept 1994	Pit Lane	79721
9 cm	13 Sept 1994	Leigh Cottage	79722
8.9 cm	23 Apr 2013	Maggies Field (Se-05)	135889
8.8 cm	23 Apr 2013	Maggies Field (Se-05)	135889
8.8 cm	13 Sept 1994	Pit Lane	79721
8.5 cm	23 Apr 2013	Maggies Field (Se-05)	135889
8.5 cm	13 Sept 1994	Pit Lane	79721
8.3 cm	23 Apr 2013	Maggies Field (Se-05)	135889

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
Maggies Field (Se-05)	22 Mar 1999	19 Sept 2019	4
Bee Farm	8 Oct 2013	8 Oct 2013	1
Pit Lane	13 Sept 1994	25 May 1999	2
Leigh Cottage	13 Sept 1994	12 May 1999	2
Curdon Mill	29 Sept 1994	9 Apr 1999	2
High Bridge	26 Mar 1999	26 Mar 1999	1
Kingswood	21 Sept 1994	21 Sept 1994	1

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

1994–2019

Survey records by year

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

494

095

096

097

098

599

000

001

002

003

004

105

006

007

008

009

010

011

012

213

014

015

016

017

018

119

Fish measured by surveyors

Measured length distribution

See how the 317 measured fish were spread across different length ranges.

Smallest: 1.5 cm
Lower quarter: 4.5 cm
Median: 5.8 cm
Upper quarter: 6.9 cm
Largest: 9.7 cm

0–99 mm

317

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 66 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.1 oz (0.002 kg)
Median: 0.1 oz (0.004 kg)
Upper quarter: 0.2 oz (0.006 kg)
Heaviest: 0.5 oz (0.014 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Main Doniford Stream

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

Brown / sea trout European eel Brook lamprey Minnow 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 →