Bullhead · Cottus gobio

Bullhead in the Mells Stream

Largest measured bullhead: 8.2 cm

The largest bullhead measured in Environment Agency surveys of the Mells Stream was 8.2 cm, recorded at Old Down Wood on 18 July 2017.

Across 316 measured bullhead, the median measured length was 5.6 cm.

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

See bullhead records across England →

Most recent observation15 August 2024Old Down Wood

Largest measured bullhead: 8.2 cm
Median length: 5.6 cm
Fish measured: 316
Survey locations: 3

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
8.2 cm	18 Jul 2017	Old Down Wood	150960
7.8 cm	18 Jul 2017	Old Down Wood	150960
7.7 cm	18 Jul 2017	Old Down Wood	150960
7.7 cm	18 Jul 2017	Old Down Wood	150960
7.6 cm	18 Jul 2017	Old Down Wood	150960
7.5 cm	18 Jul 2017	Old Down Wood	150960
7.5 cm	18 Jul 2017	Old Down Wood	150960
7.4 cm	24 Jul 2017	Edford Woods (Se-01)	151005
7.4 cm	24 Jul 2017	Edford Woods (Se-01)	151005
7.4 cm	18 Jul 2017	Old Down Wood	150960

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
Old Down Wood	18 Jul 2017	15 Aug 2024	2
Edford Woods (Se-01)	26 Jul 2001	16 Jul 2024	3
Coleford	9 Aug 2001	9 Aug 2001	1

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

2001–2024

Survey records by year

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

201

002

003

004

005

006

007

008

009

010

011

012

013

014

015

016

217

018

019

020

021

022

023

224

Fish measured by surveyors

Measured length distribution

See how the 316 measured fish were spread across different length ranges.

Smallest: 2.2 cm
Lower quarter: 3.6 cm
Median: 5.6 cm
Upper quarter: 6.3 cm
Largest: 8.2 cm

0–99 mm

316

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Mells Stream

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

Brown / sea trout

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 →