Bullhead · Cottus gobio

Bullhead in the Bourn/Black Brook

Largest measured bullhead: 6.5 cm

The largest bullhead measured in Environment Agency surveys of the Bourn/Black Brook was 6.5 cm, recorded at Fazeley on 6 July 2015.

Across 20 measured bullhead, the median measured length was 2.6 cm.

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

See bullhead records across England →

Most recent observation21 April 2026Hints

Largest measured bullhead: 6.5 cm
Median length: 2.6 cm
Fish measured: 20
Survey locations: 6

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
6.5 cm	6 Jul 2015	Fazeley	145549
6 cm	6 Jul 2015	Fazeley	145549
5.4 cm	6 Jul 2015	Fazeley	145549
5.4 cm	6 Jul 2015	Fazeley	145549
5 cm	6 Jul 2015	Fazeley	145549
3.1 cm	6 Jul 2015	Fazeley	145549
2.9 cm	6 Jul 2015	Fazeley	145549
2.7 cm	6 Jul 2015	Fazeley	145549
2.7 cm	6 Jul 2015	Fazeley	145549
2.7 cm	6 Jul 2015	Fazeley	145549

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
Hints	17 Jul 1996	21 Apr 2026	5
Shenstone Site One	21 Sept 2004	15 Apr 2025	5
Fazeley	9 Jul 2013	6 Jul 2015	3
Thickbroom	23 Jul 1996	30 Apr 2013	4
Lodge Farm	10 Jul 1996	23 Apr 2013	4
Shenstone, Lammas Land	14 Jan 2003	14 Jan 2003	1

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

1996–2026

Survey records by year

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

396

097

098

399

000

001

002

103

404

005

006

007

008

009

110

011

012

613

014

115

016

017

018

119

020

021

022

023

024

125

126

Fish measured by surveyors

Measured length distribution

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

Smallest: 1.5 cm
Lower quarter: 2.2 cm
Median: 2.7 cm
Upper quarter: 3.6 cm
Largest: 6.5 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bourn/Black Brook

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

Roach Dace Brown / sea trout Stone loach 3-spined stickleback Chub

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 →