Bullhead · Cottus gobio

Bullhead in the Main River Biss

Largest measured bullhead: 9.5 cm

The largest bullhead measured in Environment Agency surveys of the Main River Biss was 9.5 cm, recorded at Penleigh Farm (Se-03) on 12 July 2010.

Across 182 measured bullhead, the median measured length was 4.3 cm.

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

See bullhead records across England →

Most recent observation18 October 2016Penleigh Farm (Se-03) · 117 fish

Largest measured bullhead: 9.5 cm
Median length: 4.3 cm
Fish measured: 182
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	12 Jul 2010	Penleigh Farm (Se-03)	122763
8.9 cm	28 Jun 2012	Ashton Hill Farm	131684
8.7 cm	18 Oct 2016	Penleigh Farm (Se-03)	149792
8.6 cm	28 Jun 2012	Ashton Hill Farm	131684
8.5 cm	18 Oct 2016	Penleigh Farm (Se-03)	149792
8.5 cm	18 Oct 2016	Penleigh Farm (Se-03)	149792
8.5 cm	28 Jun 2012	Ashton Hill Farm	131684
8.4 cm	12 Jul 2010	Penleigh Farm (Se-03)	122763
8.3 cm	12 Jul 2010	Penleigh Farm (Se-03)	122763
8.2 cm	18 Oct 2016	Penleigh Farm (Se-03)	149792

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
Penleigh Farm (Se-03)	4 Apr 2003	18 Oct 2016	3
Ashton Hill Farm	31 Jul 1997	28 Jun 2012	3
Brook House	16 May 2012	16 May 2012	1
u/s Blackball Hatch (Te)	14 Aug 2003	11 Jul 2005	3
Upstream Yarn Brook	16 Sept 1997	16 Sept 1997	1

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

1997–2016

Survey records by year

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

297

098

099

000

001

002

203

104

105

006

107

008

009

110

011

212

013

014

015

116

Fish measured by surveyors

Measured length distribution

See how the 182 measured fish were spread across different length ranges.

Smallest: 2.2 cm
Lower quarter: 3.5 cm
Median: 4.3 cm
Upper quarter: 6.6 cm
Largest: 9.5 cm

0–99 mm

182

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Main River Biss

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

Brown / sea trout Minnow Chub Dace 3-spined stickleback Roach

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 →