Bullhead · Cottus gobio

Bullhead in the Malham Beck

Largest measured bullhead: 9.6 cm

The largest bullhead measured in Environment Agency surveys of the Malham Beck was 9.6 cm, recorded at Malham Forge on 21 August 2007.

Across 1,759 measured bullhead, the median measured length was 5.6 cm.

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

See bullhead records across England →

Most recent observation18 August 2025Malham Forge

Largest measured bullhead: 9.6 cm
Median length: 5.6 cm
Fish measured: 1,759
Survey locations: 2

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
9.6 cm	21 Aug 2007	Malham Forge	108507
9 cm	19 Sept 2008	Malham Forge	114912
8.9 cm	9 Aug 2012	Malham Forge	132811
8.7 cm	9 Sept 2004	Malham Forge	83582
8.6 cm	25 Aug 2022	Listers Arms	161332
8.6 cm	9 Aug 2012	Malham Forge	132811
8.6 cm	9 Sept 2004	Malham Forge	83582
8.4 cm	16 Aug 2021	Listers Arms	160145
8.4 cm	9 Aug 2012	Malham Forge	132811
8.4 cm	23 Sept 2005	Malham Forge	89097

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
Malham Forge	14 Aug 2002	18 Aug 2025	20
Listers Arms	25 Sept 2017	18 Aug 2025	7

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

2002–2025

Survey records by year

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

102

103

104

105

006

107

108

109

010

111

112

113

114

015

116

217

218

219

020

221

222

123

224

225

Fish measured by surveyors

Measured length distribution

See how the 1,759 measured fish were spread across different length ranges.

Smallest: 1.6 cm
Lower quarter: 4.6 cm
Median: 5.6 cm
Upper quarter: 6.4 cm
Largest: 9.6 cm

0–99 mm

1759

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Malham Beck

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

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 →