Bullhead · Cottus gobio

Bullhead in the River Lymn FMU

Largest measured bullhead: 11.4 cm

The largest bullhead measured in Environment Agency surveys of the River Lymn FMU was 11.4 cm, recorded at Raithby Bridge on 6 October 1987.

Across 624 measured bullhead, the median measured length was 6.1 cm.

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

See bullhead records across England →

Most recent observation6 June 2024Partney Bridge

Largest measured bullhead: 11.4 cm
Median length: 6.1 cm
Fish measured: 624
Survey locations: 7

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
11.4 cm	6 Oct 1987	Raithby Bridge	58167
11.3 cm	29 Sept 1987	Mill Bridge	58170
11 cm	6 Oct 1987	Raithby Bridge	58167
10.7 cm	30 Apr 2003	Partney Bridge	78667
10.7 cm	1 Apr 1996	Raithby Bridge	58151
10.5 cm	3 Apr 1996	Mill Bridge	58154
10.5 cm	1 Apr 1996	Raithby Bridge	58151
10.4 cm	1 Apr 1996	Stockwith Mill	58150
10.3 cm	6 Oct 1987	Raithby Bridge	58167
10.1 cm	1 Apr 1996	Partney Bridge	58152

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
Partney Bridge	6 Oct 1987	6 Jun 2024	8
Snipe Dales	26 Mar 2014	23 Sept 2019	3
Stockwith Mill	6 Oct 1987	6 Sept 2019	8
Raithby Bridge	6 Oct 1987	11 Jul 2016	7
Upstream Tetford STW	26 Mar 2014	26 Mar 2014	1
Mill Bridge	29 Sept 1987	14 May 2003	4
Moat House Farm	2 Oct 1987	2 Apr 1996	3

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

1987–2024

Survey records by year

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

587

088

089

090

091

092

393

094

095

596

097

098

099

000

001

102

403

004

005

006

307

008

009

010

011

312

013

214

115

316

017

018

319

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 624 measured fish were spread across different length ranges.

Smallest: 3.4 cm
Lower quarter: 5 cm
Median: 6.1 cm
Upper quarter: 7.1 cm
Largest: 11.4 cm

0–99 mm

612

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lymn FMU

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

Brown / sea trout European eel 3-spined stickleback Roach Perch 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 →