RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main Yealm

Largest measured bullhead: 8.7 cm

The largest bullhead measured in Environment Agency surveys of the River Main Yealm was 8.7 cm, recorded at Puslinch Bridge on 18 August 2022.

Across 841 measured bullhead, the median measured length was 5.5 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 Yealm.

See bullhead records across England →

Most recent observation28 August 2025Treby Ham · 3 fish
Largest measured bullhead
8.7 cm
Median length
5.5 cm
Fish measured
841
Survey locations
24

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 cm18 Aug 2022Puslinch Bridge161618
8.5 cm23 Sept 2021South Hele160683
8.5 cm23 Sept 2021South Hele160683
8.4 cm8 Aug 2022South Hele161619
8.3 cm8 Aug 2022South Hele161619
8.2 cm18 Aug 2022Puslinch Bridge161618
8.2 cm17 Aug 2016Puslinch Bridge149005
8.2 cm23 Aug 2012Puslinch Bridge132978
8.1 cm23 Sept 2021South Hele160683
8 cm23 Sept 2021South Hele160683

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
Treby Ham7 Aug 200228 Aug 202514
Putta Pool3 Aug 200215 Aug 202518
Woodburn Farm28 Sept 202324 Sept 20242
Yealmpton5 Oct 202328 Aug 20242
Yealmbridge28 Sept 202328 Aug 20242
Puslinch Bridge5 Aug 200214 Aug 202413
Downstream Puslinch Br31 Aug 202314 Aug 20242
Upstream Treby Ham18 Jul 202418 Jul 20241
Downstream South Hele10 Oct 202318 Jul 20242
Downstream Putta Pool9 Aug 202318 Jul 20242
Challonsleigh17 Sept 201412 Sept 20232
South Hele2 Aug 20028 Aug 202211
Potsons Wood6 Aug 200231 Jul 201813
Upstream Lee Mill STW Pumping Station17 Sept 201417 Sept 20141
Upstream Hitchcombe Tributary17 Sept 201417 Sept 20141
Downstream Strashleigh Hams Landfill Site17 Sept 201417 Sept 20141
Downstream Hitchcombe Unidentified Outfall17 Sept 201417 Sept 20141
Southwood Wood19 Aug 20025 Aug 20143
50m d/s Lotherton Bridge6 Aug 20126 Aug 20121
u/s Blachford Lake6 Aug 200914 Oct 20102
d/s Blachford Lake21 Sept 20053 Aug 20062
Woodburn3 Aug 20063 Aug 20061
u/s Dendles Wood4 Aug 20044 Aug 20041
Yealmpton Mill19 Aug 200219 Aug 20021

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

2002–2025

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 841 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
3.6 cm
Median
5.5 cm
Upper quarter
6.2 cm
Largest
8.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Yealm

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

Brown / sea trout Atlantic salmon European eel Minnow Brook lamprey Flounder

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 →