Bullhead · Cottus gobio

Bullhead in the Ivel Navigation

Largest measured bullhead: 9.3 cm

The largest bullhead measured in Environment Agency surveys of the Ivel Navigation was 9.3 cm, recorded at Clifton on 10 March 1989.

Across 62 measured bullhead, the median measured length was 6.3 cm.

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

See bullhead records across England →

Most recent observation2 September 2024Horse Bridge · 12 fish

Largest measured bullhead: 9.3 cm
Median length: 6.3 cm
Fish measured: 62
Survey locations: 2

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	10 Mar 1989	Clifton	29239
8.9 cm	11 May 2010	Horse Bridge	121497
8.5 cm	11 May 2010	Horse Bridge	121497
8.4 cm	11 May 2010	Horse Bridge	121497
8.3 cm	10 Mar 1989	Horse Bridge	29238
8.2 cm	2 Sept 2024	Horse Bridge	166570
8.2 cm	11 May 2010	Horse Bridge	121497
8.1 cm	1 Sept 2016	Horse Bridge	149168
7.8 cm	1 Sept 2016	Horse Bridge	149168
7.8 cm	1 Sept 2016	Horse Bridge	149168

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
Horse Bridge	10 Mar 1989	2 Sept 2024	4
Clifton	10 Mar 1989	3 Aug 2016	2

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

098

099

000

001

002

003

004

005

006

007

008

009

110

011

012

013

014

015

216

017

018

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 62 measured fish were spread across different length ranges.

Smallest: 2.9 cm
Lower quarter: 5.9 cm
Median: 6.4 cm
Upper quarter: 7.4 cm
Largest: 9.3 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Ivel Navigation

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

Roach Gudgeon Dace Pike Chub Minnow

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 →