Bullhead · Cottus gobio

Bullhead in the River Arun

Largest measured bullhead: 10.2 cm

The largest bullhead measured in Environment Agency surveys of the River Arun was 10.2 cm, recorded at Bucks Green on 13 July 2005.

Across 827 measured bullhead, the median measured length was 6.5 cm.

Surveyors recorded weights for 555 bullhead. The median was 0.1 oz (0.004 kg) and the largest recorded weight was 0.5 oz (0.015 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 Arun.

See bullhead records across England →

Most recent observation10 September 2025Crosby Farm · 2 fish

Largest measured bullhead: 10.2 cm
Median length: 6.5 cm
Fish measured: 827
Survey locations: 14

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
10.2 cm	13 Jul 2005	Bucks Green	86979
10.2 cm	13 Jul 2005	Bucks Green	86979
9.6 cm	10 Aug 2009	Roman Station	120806
9.6 cm	13 Jul 2005	Bucks Green	86979
9.5 cm	9 Jul 2025	Horsham Downstream Pack Horse Bridge	177296
9.5 cm	8 Aug 2012	Roman Station	133171
9.4 cm	21 Jul 2004	Bucks Green	80813
9.4 cm	24 Jul 2003	Bucks Green	76694
9.2 cm	14 Jul 2008	Roman Station	112072
9.2 cm	27 Sept 2007	Bucks Green	107319

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
Crosby Farm	10 Sept 2025	10 Sept 2025	1
Theale Farm	9 Sept 2014	29 Jul 2025	2
Horsham Downstream Pack Horse Bridge	26 Jul 2022	9 Jul 2025	2
Pallingham	12 Sept 2007	28 Jul 2022	6
Chesworth Farm, Downstream Chesworth House	20 Sept 2012	4 Aug 2016	2
Roman Station	30 Jul 2002	26 Jul 2016	11
Horsham STW	1 Aug 2002	26 Jul 2016	8
Bignor Farm	4 Sept 2014	4 Sept 2014	1
Bucks Green	16 Aug 2002	27 Sept 2007	6
Chesworth Farm	2 Aug 2002	14 Aug 2006	5
Gibbons Mill	31 Jul 2002	26 Jul 2006	5
Violets Farm sq	8 Sept 2005	8 Sept 2005	1
Horsham-by-Pass sq	2 Aug 2005	2 Aug 2005	1
Newbridge	30 Jul 2002	14 Jul 2005	3

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.

602

603

404

805

406

307

208

309

110

011

312

213

214

015

416

017

018

119

020

021

222

023

024

325

Fish measured by surveyors

Measured length distribution

See how the 827 measured fish were spread across different length ranges.

Smallest: 2.2 cm
Lower quarter: 4.8 cm
Median: 6.5 cm
Upper quarter: 7.5 cm
Largest: 10.2 cm

0–99 mm

825

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 555 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 (0.003 kg)
Median: 0.1 oz (0.004 kg)
Upper quarter: 0.2 oz (0.007 kg)
Heaviest: 0.5 oz (0.015 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 Arun

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

Roach Chub Gudgeon European eel Minnow Pike

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 →