Bullhead · Cottus gobio

Bullhead in the River Main Avill

Largest measured bullhead: 9.5 cm

The largest bullhead measured in Environment Agency surveys of the River Main Avill was 9.5 cm, recorded at Lower Marsh Farm on 29 April 2015.

Across 520 measured bullhead, the median measured length was 5.2 cm.

Surveyors recorded weights for 14 bullhead. The median was 0.1 oz (0.002 kg) and the largest recorded weight was 0.2 oz (0.005 kg).

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

See bullhead records across England →

Most recent observation30 April 2015Marsh St · 235 fish

Largest measured bullhead: 9.5 cm
Median length: 5.2 cm
Fish measured: 520
Survey locations: 5

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
9.5 cm	29 Apr 2015	Lower Marsh Farm	144623
9.1 cm	10 Apr 2014	Lower Marsh Farm	140704
8.6 cm	10 Apr 2014	Marsh St	140705
8.6 cm	10 Apr 2014	Marsh St	140705
8.5 cm	29 Apr 2015	Lower Marsh Farm	144623
8.5 cm	10 Apr 2014	Marsh St	140705
8.3 cm	10 Apr 2014	Lower Marsh Farm	140704
8.3 cm	13 Oct 1992	Mansley Combe	80097
8.2 cm	29 Apr 2015	Lower Marsh Farm	144623
8.2 cm	10 Apr 2014	Marsh St	140705

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
Marsh St	10 Apr 2014	30 Apr 2015	2
Lower Marsh Farm	10 Apr 2014	29 Apr 2015	2
Merry Meadow	9 Apr 2013	9 Apr 2013	1
Wanaroo Farm (Se-05)	11 Apr 2005	28 Apr 2010	2
Mansley Combe	13 Oct 1992	13 Oct 1992	1

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

1992–2015

Survey records by year

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

192

093

094

095

096

097

098

099

000

001

002

003

004

105

006

007

008

009

110

011

012

113

214

215

Fish measured by surveyors

Measured length distribution

See how the 520 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 4.3 cm
Median: 5.2 cm
Upper quarter: 6.5 cm
Largest: 9.5 cm

0–99 mm

520

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 14 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 (0.002 kg)
Upper quarter: 0.1 oz (0.0038 kg)
Heaviest: 0.2 oz (0.005 kg)

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

More fish in this river

Explore the River Main Avill

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

Brown / sea trout European eel

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 →