RiverFish

Bullhead · Cottus gobio

Bullhead in the Mount Tavy Stream

Largest measured bullhead: 8.7 cm

The largest bullhead measured in Environment Agency surveys of the Mount Tavy Stream was 8.7 cm, recorded at Mount Tavy on 20 August 2025.

Across 109 measured bullhead, the median measured length was 4.7 cm.

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

See bullhead records across England →

Most recent observation20 August 2025Mount Tavy · 26 fish
Largest measured bullhead
8.7 cm
Median length
4.7 cm
Fish measured
109
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.

LengthSurvey dateSurvey locationSurvey ID
8.7 cm20 Aug 2025Mount Tavy179152
8.7 cm20 Aug 2025Mount Tavy179152
8.4 cm20 Aug 2025Mount Tavy179152
8.3 cm8 Aug 2013Mount Tavy137869
8.2 cm8 Aug 2013Mount Tavy137869
8.1 cm20 Aug 2025Mount Tavy179152
8.1 cm20 Aug 2025Mount Tavy179152
8.1 cm6 Jul 1998Whitchurch Down104784
8.1 cm6 Jul 1998Whitchurch Down104784
8 cm20 Aug 2025Mount Tavy179152

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
Mount Tavy18 Jul 198320 Aug 20257
Whitchurch Down6 Jul 19986 Jul 19981

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

1983–2025

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 109 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
3.5 cm
Median
4.7 cm
Upper quarter
6.4 cm
Largest
8.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Mount Tavy Stream

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

Brown / sea trout European eel Atlantic salmon

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 →