Bullhead · Cottus gobio

Bullhead in the River Ryton

Largest measured bullhead: 10 cm

The largest bullhead measured in Environment Agency surveys of the River Ryton was 10 cm, recorded at Scofton on 20 September 2012.

Across 84 measured bullhead, the median measured length was 7.2 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 Ryton.

See bullhead records across England →

Most recent observation21 July 2025Scofton

Largest measured bullhead: 10 cm
Median length: 7.2 cm
Fish measured: 84
Survey locations: 6

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 cm	20 Sept 2012	Scofton	133784
9.4 cm	6 Jul 2017	Scofton	150899
9.2 cm	13 May 2015	Potters Nook Bridge	146193
9.2 cm	20 Sept 2012	Scofton	133784
9.2 cm	20 Sept 2012	Scofton	133784
9 cm	6 Jul 2017	Scofton	150899
9 cm	20 Sept 2012	Scofton	133784
9 cm	20 Sept 2012	Scofton	133784
9 cm	20 Sept 2012	Scofton	133784
9 cm	20 Sept 2012	Scofton	133784

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
Scofton	4 Aug 2003	21 Jul 2025	5
Serlby	5 Aug 2003	6 Jul 2017	6
Potters Nook Bridge	13 May 2015	13 May 2015	1
Scrooby	28 Jun 2006	28 Jun 2006	1
Red Bridge Hodsock	27 Jun 2006	27 Jun 2006	1
Shireoaks	23 Jan 1992	12 Oct 1999	3

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

1992–2025

Survey records by year

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

192

093

194

095

096

097

098

199

000

001

002

203

104

205

306

007

008

009

010

011

212

013

014

115

016

217

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 84 measured fish were spread across different length ranges.

Smallest: 2.5 cm
Lower quarter: 6.1 cm
Median: 7.2 cm
Upper quarter: 8.2 cm
Largest: 10 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ryton

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

Stone loach Minnow European eel Chub Dace 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 →