Bullhead · Cottus gobio

Bullhead in the Ogden Brook

Largest measured bullhead: 12.3 cm

The largest bullhead measured in Environment Agency surveys of the Ogden Brook was 12.3 cm, recorded at Iwog05 on 13 January 1997.

Across 12 measured bullhead, the median measured length was 10.2 cm.

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

See bullhead records across England →

Most recent observation1 October 2025Iwog07

Largest measured bullhead: 12.3 cm
Median length: 10.2 cm
Fish measured: 12
Survey locations: 4

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
12.3 cm	13 Jan 1997	Iwog05	55713
12 cm	13 Jan 1997	Iwog05	55713
11.9 cm	13 Jan 1997	Iwog05	55713
11.6 cm	13 Jan 1997	Iwog05	55713
11.5 cm	13 Jan 1997	Iwog05	55713
10.5 cm	13 Jan 1997	Iwog05	55713
9.9 cm	13 Jan 1997	Iwog05	55713
9.5 cm	13 Jan 1997	Iwog05	55713
8 cm	13 Jan 1997	Iwog05	55713
8 cm	13 Jan 1997	Iwog05	55713

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
Iwog07	22 Jun 2011	1 Oct 2025	4
Iwog04	5 Jun 2006	28 Aug 2018	4
Og02	13 Jan 1997	13 Jan 1997	1
Iwog05	13 Jan 1997	13 Jan 1997	1

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

1997–2025

Survey records by year

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

297

098

099

000

001

002

003

004

005

106

007

008

009

010

111

112

013

114

115

016

017

118

019

020

021

022

123

024

125

Fish measured by surveyors

Measured length distribution

See how the 12 measured fish were spread across different length ranges.

Smallest: 7.4 cm
Lower quarter: 8 cm
Median: 10.2 cm
Upper quarter: 11.7 cm
Largest: 12.3 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Ogden Brook

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

Brown / sea trout

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 →