Bullhead · Cottus gobio

Bullhead in the Greylake Stream

Largest measured bullhead: 9 cm

The largest bullhead measured in Environment Agency surveys of the Greylake Stream was 9 cm, recorded at Outgrounds on 6 July 2021.

Across 433 measured bullhead, the median measured length was 5.6 cm.

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

See bullhead records across England →

Most recent observation29 June 2026Outgrounds · 5 fish

Largest measured bullhead: 9 cm
Median length: 5.6 cm
Fish measured: 433
Survey locations: 2

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 cm	6 Jul 2021	Outgrounds	160652
8.5 cm	21 Jun 2018	Outgrounds	152754
8.5 cm	24 Jul 2017	St. Leonards	151196
8.1 cm	16 Aug 2023	St. Leonards	163052
7.8 cm	22 Jun 2023	Outgrounds	162564
7.8 cm	28 Jul 2011	St. Leonards	127189
7.8 cm	28 Jul 2011	St. Leonards	127189
7.8 cm	28 Jul 2011	St. Leonards	127189
7.7 cm	4 Jul 2013	Outgrounds	137001
7.7 cm	28 Jul 2011	St. Leonards	127189

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
Outgrounds	15 Jul 1980	29 Jun 2026	30
St. Leonards	18 Jul 1985	16 Aug 2023	10

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

1980–2026

Survey records by year

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

180

081

082

083

084

285

086

087

288

189

190

291

092

093

294

095

096

297

098

099

200

001

102

103

104

105

206

107

108

109

110

211

012

113

014

115

016

217

118

119

020

121

122

223

124

125

126

Fish measured by surveyors

Measured length distribution

See how the 433 measured fish were spread across different length ranges.

Smallest: 1.2 cm
Lower quarter: 3.1 cm
Median: 5.6 cm
Upper quarter: 6.3 cm
Largest: 9 cm

0–99 mm

433

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Greylake Stream

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

Brown / sea trout Atlantic salmon European eel

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 →