Bullhead · Cottus gobio

Bullhead in the Elstow Brook

Largest measured bullhead: 9.3 cm

The largest bullhead measured in Environment Agency surveys of the Elstow Brook was 9.3 cm, recorded at Cardington on 18 July 1989.

Across 71 measured bullhead, the median measured length was 6.2 cm.

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

See bullhead records across England →

Most recent observation14 August 2024Elstow Moor · 1 fish

Largest measured bullhead: 9.3 cm
Median length: 6.2 cm
Fish measured: 71
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
9.3 cm	18 Jul 1989	Cardington	29098
8.8 cm	18 Jul 1989	Cardington	29098
8.4 cm	4 Aug 2015	Willington	145760
8.3 cm	18 Jul 1989	Cardington	29098
8.2 cm	1 Aug 2013	Willington	137666
8.1 cm	14 Aug 2024	Elstow Moor	166464
7.8 cm	18 Jul 1989	Cardington	29098
7.7 cm	24 Mar 2011	Hardwick Bridge	126000
7.5 cm	24 Mar 2011	Hardwick Bridge	126000
7.4 cm	1 Aug 2013	Willington	137666

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
Elstow Moor	3 Sept 2014	14 Aug 2024	4
Willington	6 Jul 1998	4 Aug 2015	4
Hardwick Bridge	24 Mar 2011	24 Mar 2011	1
Harrowden Bridge	6 May 2003	6 May 2003	1
Cardington	18 Jul 1989	18 Jul 1989	1
Harrowden	17 Jul 1989	17 Jul 1989	1

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

1989–2024

Survey records by year

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

289

090

091

092

093

094

095

096

097

198

099

000

001

002

203

004

005

006

007

008

009

010

111

012

113

114

215

016

017

018

019

020

121

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 71 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 5.4 cm
Median: 6.2 cm
Upper quarter: 6.9 cm
Largest: 9.3 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Elstow Brook

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

Stone loach Gudgeon Chub Minnow Roach Spined loach

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 →