Bullhead · Cottus gobio

Bullhead in the Garren Brook

Largest measured bullhead: 9.5 cm

The largest bullhead measured in Environment Agency surveys of the Garren Brook was 9.5 cm, recorded at Trereece on 29 August 2013.

Across 20 measured bullhead, the median measured length was 7.2 cm.

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

See bullhead records across England →

Most recent observation7 August 2025Trereece

Largest measured bullhead: 9.5 cm
Median length: 7.2 cm
Fish measured: 20
Survey locations: 1

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
9.5 cm	29 Aug 2013	Trereece	138232
9.3 cm	29 Aug 2013	Trereece	138232
9.2 cm	29 Aug 2013	Trereece	138232
9 cm	29 Aug 2013	Trereece	138232
8.5 cm	29 Aug 2013	Trereece	138232
8 cm	29 Aug 2013	Trereece	138232
7.9 cm	29 Aug 2013	Trereece	138232
7.6 cm	29 Aug 2013	Trereece	138232
7.5 cm	29 Aug 2013	Trereece	138232
7.2 cm	29 Aug 2013	Trereece	138232

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
Trereece	23 Sept 2008	7 Aug 2025	5

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

2008–2025

Survey records by year

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

108

009

010

111

012

113

014

015

016

017

018

119

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 20 measured fish were spread across different length ranges.

Smallest: 2.5 cm
Lower quarter: 3.8 cm
Median: 7.2 cm
Upper quarter: 8.1 cm
Largest: 9.5 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Garren Brook

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

Brown / sea trout 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 →