Bullhead · Cottus gobio

Bullhead in the Gallica Stream

Largest measured bullhead: 8.2 cm

The largest bullhead measured in Environment Agency surveys of the Gallica Stream was 8.2 cm, recorded at Upstream Holt Mill on 18 August 1993.

Across 91 measured bullhead, the median measured length was 4 cm.

Surveyors recorded weights for 56 bullhead. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.4 oz (0.01 kg).

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

See bullhead records across England →

Most recent observation20 May 2004Melbury Park (Se-04)

Largest measured bullhead: 8.2 cm
Median length: 4 cm
Fish measured: 91
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
8.2 cm	18 Aug 1993	Upstream Holt Mill	79967
8 cm	18 Aug 1993	Upstream Holt Mill	79967
7.6 cm	18 Aug 1993	Holt Mill	79971
7.6 cm	18 Aug 1993	Holt Mill	79971
7.2 cm	18 Aug 1993	Upstream Holt Mill	79967
7.1 cm	24 Aug 1993	Melbury Park (Se-04)	79966
7.1 cm	17 Aug 1993	Upstream Elsford Bridge	79974
7 cm	24 Aug 1993	Melbury Park (Se-04)	79966
7 cm	18 Aug 1993	Upstream Holt Mill	79967
6.8 cm	24 Aug 1993	Melbury Park (Se-04)	79966

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
Melbury Park (Se-04)	24 Aug 1993	20 May 2004	2
Upstream Holt Mill	18 Aug 1993	18 Aug 1993	1
Holt Mill	18 Aug 1993	18 Aug 1993	1
Upstream Elsford Bridge	17 Aug 1993	17 Aug 1993	1

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

1993–2004

Survey records by year

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

493

094

095

096

097

098

099

000

001

002

003

104

Fish measured by surveyors

Measured length distribution

See how the 91 measured fish were spread across different length ranges.

Smallest: 1.7 cm
Lower quarter: 3.2 cm
Median: 4 cm
Upper quarter: 6 cm
Largest: 8.2 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 56 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.1 oz (0.0018 kg)
Median: 0.1 oz (0.003 kg)
Upper quarter: 0.1 oz (0.004 kg)
Heaviest: 0.4 oz (0.01 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Gallica Stream

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

Brown / sea trout European eel Stone loach

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 →