Bullhead · Cottus gobio

Bullhead in the Cragg Brook

Largest measured bullhead: 9 cm

The largest bullhead measured in Environment Agency surveys of the Cragg Brook was 9 cm, recorded at Mytholmroyd on 13 October 2021.

Across 734 measured bullhead, the median measured length was 5.2 cm.

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

See bullhead records across England →

Most recent observation13 October 2021DS Cragg Road · 279 fish

Largest measured bullhead: 9 cm
Median length: 5.2 cm
Fish measured: 734
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 cm	13 Oct 2021	Mytholmroyd	160827
8.4 cm	19 Sept 2003	Mytholmroyd	78696
8.2 cm	13 Oct 2021	Mytholmroyd	160827
8 cm	13 Oct 2021	Mytholmroyd	160827
8 cm	19 Sept 2003	Mytholmroyd	78696
7.9 cm	19 Sept 2003	Mytholmroyd	78696
7.8 cm	13 Oct 2021	DS Cragg Road	160883
7.8 cm	2 Sept 2009	Mytholmroyd	120415
7.7 cm	2 Sept 2009	Mytholmroyd	120415
7.6 cm	13 Oct 2021	DS Cragg Road	160883

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
Mytholmroyd	19 Sept 2003	13 Oct 2021	4
DS Cragg Road	13 Oct 2021	13 Oct 2021	1

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

2003–2021

Survey records by year

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

103

004

005

006

007

008

109

010

011

012

013

014

115

016

017

018

019

020

221

Fish measured by surveyors

Measured length distribution

See how the 734 measured fish were spread across different length ranges.

Smallest: 1.8 cm
Lower quarter: 3.7 cm
Median: 5.2 cm
Upper quarter: 6.2 cm
Largest: 9 cm

0–99 mm

734

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Cragg Brook

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 →