Bullhead · Cottus gobio

Bullhead in the Derril Water

Largest measured bullhead: 6.7 cm

The largest bullhead measured in Environment Agency surveys of the Derril Water was 6.7 cm, recorded at Yeomaden on 28 July 2010.

Across 3 measured bullhead, the median measured length was 4.7 cm.

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

See bullhead records across England →

Most recent observation1 September 2022Yeomaden · 1 fish

Largest measured bullhead: 6.7 cm
Median length: 4.7 cm
Fish measured: 3
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
6.7 cm	28 Jul 2010	Yeomaden	123125
4.7 cm	1 Sept 2022	Yeomaden	161836
3.1 cm	28 Jul 2010	Yeomaden	123125

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
Yeomaden	3 Aug 1993	1 Sept 2022	4
Monks	26 Jul 1993	6 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.

1993–2022

Survey records by year

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

293

094

095

196

097

098

299

000

001

002

003

004

005

006

007

008

009

110

011

012

013

014

015

016

017

018

019

020

021

122

Fish measured by surveyors

Measured length distribution

See how the 3 measured fish were spread across different length ranges.

Smallest: 3.1 cm
Lower quarter: 3.9 cm
Median: 4.7 cm
Upper quarter: 5.7 cm
Largest: 6.7 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Derril Water

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

Minnow 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 →