Bullhead · Cottus gobio

Bullhead in the River Lyd

Largest measured bullhead: 10.4 cm

The largest bullhead measured in Environment Agency surveys of the River Lyd was 10.4 cm, recorded at u/s Whitecroft on 14 April 1997.

Across 199 measured bullhead, the median measured length was 6.7 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 Lyd.

See bullhead records across England →

Most recent observation16 September 2025Downstream Weir, Next To Boating Lake

Largest measured bullhead: 10.4 cm
Median length: 6.7 cm
Fish measured: 199
Survey locations: 10

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
10.4 cm	14 Apr 1997	u/s Whitecroft	64780
10.4 cm	14 Apr 1997	Lydney	63681
9.9 cm	14 Apr 1997	Lydney	63681
9.8 cm	21 Sept 2000	u/s Whitecroft	65560
9.8 cm	14 Apr 1997	u/s Whitecroft	64780
9.7 cm	17 Nov 1993	u/s Whitecroft	64801
9.6 cm	4 Sept 2013	Downstream Weir, Next To Boating Lake	138453
9.6 cm	14 Apr 1997	d/s Nochards	64760
9.5 cm	18 Sept 2013	u/s Lydney	138752
9.5 cm	14 Apr 1997	u/s Whitecroft	64780

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
Downstream Weir, Next To Boating Lake	4 Sept 2013	16 Sept 2025	2
u/s Whitecroft	9 Apr 1991	5 Sept 2024	10
u/s Lydney	20 Jul 1992	18 Sept 2013	10
U/s Lydney G.S.	22 Jul 2013	22 Jul 2013	1
D/s Lydney	17 Aug 2004	17 Aug 2004	1
d/s Nochards	17 Nov 1993	26 Sept 2002	3
u/s Parkend	9 Apr 1991	25 Sept 2002	3
u/s Cannop Ponds	21 Jul 1992	25 Sept 2002	3
d/s Parkend	21 Jul 1992	25 Sept 2002	2
Lydney	25 Jan 1994	14 Apr 1997	2

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

1991–2025

Survey records by year

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

291

692

493

194

095

096

597

098

099

100

001

602

103

204

105

206

007

008

009

010

011

012

413

014

015

016

017

018

019

020

021

022

023

124

125

Fish measured by surveyors

Measured length distribution

See how the 199 measured fish were spread across different length ranges.

Smallest: 1.5 cm
Lower quarter: 5.3 cm
Median: 6.7 cm
Upper quarter: 7.8 cm
Largest: 10.4 cm

0–99 mm

197

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lyd

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

European eel Brown / sea trout Roach Pike Dace Perch

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 →