Bullhead · Cottus gobio

Bullhead in the River Wandle

Largest measured bullhead: 10.4 cm

The largest bullhead measured in Environment Agency surveys of the River Wandle was 10.4 cm, recorded at Butterhill on 11 April 2002.

Across 1,512 measured bullhead, the median measured length was 5.4 cm.

Surveyors recorded one individual weight: 0.9 oz (0.026 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 Wandle.

See bullhead records across England →

Most recent observation8 October 2025Hackbridge · 118 fish

Largest measured bullhead: 10.4 cm
Median length: 5.4 cm
Fish measured: 1,512
Survey locations: 12

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
10.4 cm	11 Apr 2002	Butterhill	73751
10 cm	11 Apr 2002	Butterhill	73751
9.8 cm	7 Jul 2021	Church Road	160154
9.7 cm	11 Apr 2002	Butterhill	73751
9.6 cm	11 Apr 2002	Butterhill	73751
9.5 cm	10 May 2005	Butterhill	84875
9.4 cm	7 Jul 2021	Church Road	160154
9.4 cm	11 Apr 2002	Butterhill	73751
9.4 cm	11 Apr 2002	Butterhill	73751
9.2 cm	11 Apr 2002	Butterhill	73751

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
Hackbridge	21 Jul 1988	8 Oct 2025	18
Mapleton Road	7 Oct 2025	7 Oct 2025	1
Butterhill	21 Jun 1989	2 Oct 2025	13
Church Road	20 Apr 2006	5 Jul 2023	8
Upstream Millpond Place Bridge Investigation Site 1	4 Jul 2019	4 Jul 2019	1
Papermill Close (Mill Lane) Invest.igation Site 3	4 Jul 2019	4 Jul 2019	1
Mill Lane u/s Butterhill Brid Investigation Site 2	4 Jul 2019	4 Jul 2019	1
Watermeads Lane	17 Jun 2009	3 Jul 2019	5
Downstream Beddington Park Lake	14 Mar 2012	14 Mar 2012	1
King George Park	18 Jun 2009	22 Jun 2010	2
Corbet Close	22 Oct 2008	22 Oct 2008	1
Beddington Park	29 Jul 1997	29 Jul 1997	1

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

1988–2025

Survey records by year

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

188

189

090

091

092

093

094

095

096

297

098

099

000

001

202

103

104

205

306

107

308

409

210

411

112

413

014

415

016

317

018

719

020

221

022

223

024

325

Fish measured by surveyors

Measured length distribution

See how the 1,512 measured fish were spread across different length ranges.

Smallest: 1 cm
Lower quarter: 3.5 cm
Median: 5.4 cm
Upper quarter: 6.5 cm
Largest: 10.4 cm

0–99 mm

1510

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 0.9 oz (0.026 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 Wandle

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

3-spined stickleback Stone loach European eel Chub Roach Dace

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 →