Bullhead · Cottus gobio

Bullhead in the North River

Largest measured bullhead: 9.8 cm

The largest bullhead measured in Environment Agency surveys of the North River was 9.8 cm, recorded at West Brook Q on 22 August 2006.

Across 462 measured bullhead, the median measured length was 6 cm.

Surveyors recorded weights for 457 bullhead. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.4 oz (0.011 kg).

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

See bullhead records across England →

Most recent observation24 June 2014Oakwood Hill · 172 fish

Largest measured bullhead: 9.8 cm
Median length: 6 cm
Fish measured: 462
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
9.8 cm	22 Aug 2006	West Brook Q	102221
9 cm	29 Jul 2005	West Brook Q	86995
8.9 cm	22 Aug 2006	West Brook Q	102221
8.9 cm	4 Aug 2005	Paynes Green sq	87011
8.8 cm	29 Jul 2005	West Brook Q	86995
8.6 cm	4 Aug 2005	Paynes Green sq	87011
8.5 cm	29 Jul 2005	West Brook Q	86995
8.5 cm	18 Aug 2004	West Brook Q	81730
8.5 cm	18 Aug 2004	West Brook Q	81730
8.5 cm	18 Aug 2004	West Brook Q	81730

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
Oakwood Hill	24 Jun 2014	24 Jun 2014	1
Northlands farm	24 Jun 2014	24 Jun 2014	1
West Brook Q	5 Aug 2002	22 Aug 2006	5
Paynes Green sq	4 Aug 2005	4 Aug 2005	1

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

2002–2014

Survey records by year

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

102

103

104

205

106

007

008

009

010

011

012

013

214

Fish measured by surveyors

Measured length distribution

See how the 462 measured fish were spread across different length ranges.

Smallest: 2.5 cm
Lower quarter: 5 cm
Median: 6 cm
Upper quarter: 6.8 cm
Largest: 9.8 cm

0–99 mm

462

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 457 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 (0.003 kg)
Upper quarter: 0.1 oz (0.004 kg)
Heaviest: 0.4 oz (0.011 kg)

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

More fish in this river

Explore the North River

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

Stone loach European eel Gudgeon Minnow Perch 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 →