Bullhead · Cottus gobio

Bullhead in the Knee Brook

Largest measured bullhead: 9.3 cm

The largest bullhead measured in Environment Agency surveys of the Knee Brook was 9.3 cm, recorded at Neighbrook House on 17 October 1990.

Across 39 measured bullhead, the median measured length was 7.1 cm.

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

See bullhead records across England →

Most recent observation20 August 2004Neighbrook House

Largest measured bullhead: 9.3 cm
Median length: 7.1 cm
Fish measured: 39
Survey locations: 5

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
9.3 cm	17 Oct 1990	Neighbrook House	80686
9 cm	17 Oct 1990	Neighbrook House	80686
9 cm	10 Oct 1990	Ditchford Frary	80688
8.6 cm	8 Sept 1999	Neighbrook House	72891
8.6 cm	17 Oct 1990	u/s & d/s confl. Blockley Brook	80683
8.3 cm	17 Oct 1990	Neighbrook House	80686
8.3 cm	17 Oct 1990	u/s & d/s confl. Blockley Brook	80683
8.3 cm	16 Oct 1990	High Furze	80669
8.2 cm	10 Oct 1990	Ditchford Frary	80688
8 cm	8 Sept 1999	Neighbrook House	72891

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
u/s & d/s confl. Blockley Brook	17 Oct 1990	20 Aug 2004	4
Neighbrook House	9 Sept 1981	20 Aug 2004	5
u/s confl. Knee Brook	29 Jun 1994	29 Jun 1994	1
High Furze	16 Oct 1990	16 Oct 1990	1
Ditchford Frary	10 Oct 1990	10 Oct 1990	1

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

1981–2004

Survey records by year

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

181

082

083

084

085

086

087

088

089

490

091

092

093

394

095

096

097

098

299

000

001

002

003

204

Fish measured by surveyors

Measured length distribution

See how the 39 measured fish were spread across different length ranges.

Smallest: 3.7 cm
Lower quarter: 6.1 cm
Median: 7.1 cm
Upper quarter: 7.8 cm
Largest: 9.3 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Knee Brook

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

Brown / sea trout Minnow 3-spined stickleback Chub Dace Brook lamprey

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 →