RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main West Looe

Largest measured bullhead: 8.6 cm

The largest bullhead measured in Environment Agency surveys of the River Main West Looe was 8.6 cm, recorded at Gillhill Wood on 31 July 2024.

Across 495 measured bullhead, the median measured length was 5.1 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 Main West Looe.

See bullhead records across England →

Most recent observation8 August 2025Gillhill Wood · 19 fish
Largest measured bullhead
8.6 cm
Median length
5.1 cm
Fish measured
495
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
8.6 cm31 Jul 2024Gillhill Wood166924
8.4 cm31 Jul 2024Gillhill Wood166924
8.2 cm8 Aug 2025Gillhill Wood179034
8.2 cm31 Jul 2024Gillhill Wood166924
8 cm10 Jul 2006Gillhill Wood100056
7.9 cm17 Jul 2014Gillhill Wood141750
7.7 cm1 Aug 2014Church Bridge142073
7.7 cm23 Jul 2014Sowdens Bridge141891
7.6 cm8 Aug 2025Gillhill Wood179034
7.5 cm23 Jul 2014Sowdens Bridge141891

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
Gillhill Wood30 Sept 19948 Aug 202524
Millcoombe Farm8 Sept 199411 Aug 20144
Church Bridge3 Oct 19941 Aug 20144
Sowdens Bridge4 Oct 199423 Jul 20144
Scawn Mill19 Aug 199423 Jul 20145
Mid Quarry Park19 Aug 19949 Aug 20023

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

1994–2025

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 495 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
4 cm
Median
5.1 cm
Upper quarter
5.8 cm
Largest
8.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main West Looe

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

Brown / sea trout European eel Atlantic salmon Brook lamprey

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 →