Bullhead · Cottus gobio

Bullhead in the West Glen

Largest measured bullhead: 9 cm

The largest bullhead measured in Environment Agency surveys of the West Glen was 9 cm, recorded at Little Bytham on 23 March 1994.

Across 17 measured bullhead, the median measured length was 6 cm.

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

See bullhead records across England →

Most recent observation9 June 2023Upstream Carlby Road Bridge

Largest measured bullhead: 9 cm
Median length: 6 cm
Fish measured: 17
Survey locations: 13

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 cm	23 Mar 1994	Little Bytham	54342
8.5 cm	23 Mar 1994	Little Bytham	54342
8.5 cm	23 Mar 1994	Little Bytham	54342
8 cm	23 Mar 1994	Little Bytham	54342
7.5 cm	23 Mar 1994	Aunby	54343
7 cm	23 Mar 1994	Aunby	54343
7 cm	22 Mar 1994	Essendine	54344
6 cm	22 Mar 1994	Essendine	54344
6 cm	21 Mar 1994	Shillingthorpe	54346
6 cm	21 Mar 1994	Shillingthorpe	54346

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
Upstream Carlby Road Bridge	14 May 2010	9 Jun 2023	3
Essendine	22 Mar 1994	8 May 2012	6
Aunby	23 Mar 1994	18 May 2010	4
North Lodge 3	17 May 2010	17 May 2010	1
North Lodge 2	17 May 2010	17 May 2010	1
North Lodge 1	17 May 2010	17 May 2010	1
Downstream Shillingthorpe Bridge	17 Oct 2006	10 May 2010	3
Banthorpe	25 Jun 1999	10 May 2010	4
Upstream Shillingthorpe Weir	5 Nov 2007	5 Nov 2007	1
Greatford	26 Oct 2006	31 Oct 2007	2
Upstream Banthorpe Ford	30 Oct 2007	30 Oct 2007	1
Little Bytham	23 Mar 1994	28 Jun 1999	2
Shillingthorpe	21 Mar 1994	21 Mar 1994	1

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

1994–2023

Survey records by year

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

494

095

096

097

098

399

000

001

102

003

004

005

406

707

008

009

810

011

112

013

014

015

016

117

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 17 measured fish were spread across different length ranges.

Smallest: 3.5 cm
Lower quarter: 4.5 cm
Median: 6 cm
Upper quarter: 7.5 cm
Largest: 9 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the West Glen

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

Minnow European eel Stone loach Dace Pike Chub

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 →