Bullhead · Cottus gobio

Bullhead in the River Gowy

Largest measured bullhead: 13.1 cm

The largest bullhead measured in Environment Agency surveys of the River Gowy was 13.1 cm, recorded at Gwgo05 on 22 April 2002.

Across 206 measured bullhead, the median measured length was 8 cm.

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

See bullhead records across England →

Most recent observation16 April 2026Gwgo10

Largest measured bullhead: 13.1 cm
Median length: 8 cm
Fish measured: 206
Survey locations: 8

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
13.1 cm	22 Apr 2002	Gwgo05	53520
12.1 cm	15 Apr 2003	Gwgo05	75837
12 cm	21 Apr 2004	Gwgo05	79684
12 cm	22 Apr 2002	Gwgo05	53520
11.4 cm	22 Apr 2002	Gwgo05	53520
11.1 cm	21 Apr 2004	Gwgo05	79684
11 cm	15 Apr 2003	Gwgo05	75837
11 cm	22 Apr 2002	Gwgo05	53520
10.8 cm	15 Apr 2003	Gwgo05	75837
10.5 cm	22 Apr 2002	Gwgo05	53520

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
Gwgo10	9 Sept 1996	16 Apr 2026	14
Gwgo20	23 Apr 2002	22 May 2024	11
Gwgo06	16 Jun 2010	13 May 2024	3
Gwgo25	26 Apr 2006	25 Apr 2014	4
Gwgo15	28 Apr 2004	22 Apr 2014	7
Gwgo05	26 May 1999	29 Apr 2009	9
Gwgo02	26 Jul 1999	26 Jul 1999	1
Go01	27 Nov 1996	26 May 1999	3

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

1996–2026

Survey records by year

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

296

097

198

399

000

001

302

203

404

405

506

507

508

309

410

011

012

013

514

015

016

017

018

019

020

021

222

023

324

025

126

Fish measured by surveyors

Measured length distribution

See how the 206 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 6.7 cm
Median: 8 cm
Upper quarter: 9 cm
Largest: 13.1 cm

0–99 mm

188

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Gowy

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

European eel Stone loach 3-spined stickleback Gudgeon Roach Perch

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 →