RiverFish

Bullhead · Cottus gobio

Bullhead in the River Lambourn

Largest measured bullhead: 10.1 cm

The largest bullhead measured in Environment Agency surveys of the River Lambourn was 10.1 cm, recorded at Upstream Old A34 on 19 November 2009.

Across 5 measured bullhead, the median measured length was 9.3 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 Lambourn.

See bullhead records across England →

Most recent observation21 October 2025Moorbridge Farm
Largest measured bullhead
10.1 cm
Median length
9.3 cm
Fish measured
5
Survey locations
11

Individual EA measurements

Largest measured bullhead

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
10.1 cm19 Nov 2009Upstream Old A34120586
9.8 cm19 Nov 2009Upstream Old A34120586
9.3 cm19 Nov 2009Upstream Old A34120586
9.1 cm19 Nov 2009Upstream Old A34120586
7.4 cm19 Nov 2009Upstream Old A34120586

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 surveyedFirst recordedLast recordedVisits finding bullhead
Moorbridge Farm2 Nov 200021 Oct 202518
Easton Lodge20 Oct 200021 Oct 202520
Upstream Shaw Gauging Station31 May 201325 Jun 20142
Woodspeen16 Mar 200630 Apr 20142
Whelford Park15 Mar 200630 Apr 20143
Upstream Shaw Footbridge24 Nov 200819 Nov 20136
Upstream Old Railway Bridge24 Nov 200819 Nov 20135
Upstream Old A3424 Nov 200819 Nov 20136
Westbrook Farm20 Oct 20007 Nov 201312
East Shefford24 Mar 200624 Mar 20061
Great Shefford - Upstream Bridge4 Nov 20024 Nov 20021

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

2000–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 5 measured fish were spread across different length ranges.

Smallest
7.4 cm
Lower quarter
9.1 cm
Median
9.3 cm
Upper quarter
9.8 cm
Largest
10.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lambourn

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

Brown / sea trout Grayling Pike Minnow Atlantic salmon Roach

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 →