RiverFish

Bullhead · Cottus gobio

Bullhead in the River Hart

Largest measured bullhead: 10.2 cm

The largest bullhead measured in Environment Agency surveys of the River Hart was 10.2 cm, recorded at Upstream Pale Lane on 13 April 2007.

Across 118 measured bullhead, the median measured length was 4.6 cm.

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

See bullhead records across England →

Most recent observation21 April 2026Bramshill Police College
Largest measured bullhead
10.2 cm
Median length
4.6 cm
Fish measured
118
Survey locations
6

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
10.2 cm13 Apr 2007Upstream Pale Lane105044
9.6 cm13 Apr 2007Upstream Pale Lane105044
9.2 cm13 Apr 2007Upstream Pale Lane105044
8.9 cm13 Apr 2007Upstream Pale Lane105044
8.9 cm13 Apr 2007Upstream Pale Lane105044
8.6 cm13 Apr 2007Upstream Pale Lane105044
8.5 cm13 Apr 2007Upstream Pale Lane105044
8.3 cm13 Apr 2007Upstream Pale Lane105044
8.2 cm13 Apr 2007Upstream Pale Lane105044
8.2 cm13 Apr 2007Upstream Pale Lane105044

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
Bramshill Police College8 Apr 201021 Apr 20263
Redfields Farm9 Feb 199216 Apr 20264
Upstream Pale Lane13 Apr 200618 Apr 20133
Pilcot Mill22 Jun 199322 Jun 19931
Itchel Brookconfluence22 Jun 199322 Jun 19931
Lea Farm, Hazeley18 May 199218 May 19921

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

1992–2026

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 118 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
4 cm
Median
4.6 cm
Upper quarter
6 cm
Largest
10.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Hart

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

Stone loach Minnow Chub Dace Gudgeon Pike

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 →