RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main Fowey

Largest measured bullhead: 8.9 cm

The largest bullhead measured in Environment Agency surveys of the River Main Fowey was 8.9 cm, recorded at Trezibbett on 5 September 1977.

Across 8,764 measured bullhead, the median measured length was 4.8 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 Fowey.

See bullhead records across England →

Most recent observation10 July 2026Lower Langdon · 3 fish
Largest measured bullhead
8.9 cm
Median length
4.8 cm
Fish measured
8,764
Survey locations
21

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
8.9 cm5 Sept 1977Trezibbett120900
8.8 cm12 Sept 1979Halfway135504
8.6 cm20 Aug 2014Draynes Bridge142383
8.6 cm20 Sept 2012Ashford Bridge133748
8.6 cm9 Sept 1997Harrowbridge135557
8.5 cm19 Sept 2024Ashford Bridge167222
8.5 cm4 Aug 2017Lower Langdon151900
8.5 cm8 Sept 2016Draynes Bridge149338
8.5 cm4 Sept 2014Ashford Bridge142607
8.5 cm21 Aug 2014Doublebois142384

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
Lower Langdon11 Aug 197710 Jul 202634
Palmersbridge15 Jun 197729 Jul 202530
Ashford Bridge20 Sept 201219 Sept 20246
Draynes Bridge12 Jul 199416 Sept 202418
Halfway12 Sept 197915 Aug 202410
Brown Queen27 Sept 201215 Aug 20243
Trezibbett22 Jun 19777 Aug 202419
Upstream Doublebois Bridge13 Sept 20166 Aug 20245
Doublebois22 Jul 199421 Aug 20148
Leskernick25 Jul 201225 Jul 20121
Respryn Bridge19 Sept 19791 Sept 20116
Harrowbridge12 Jul 199425 Aug 20117
Treverbyn19 Apr 19772 Aug 201024
Restormel15 Sept 19974 Sept 20084
Glynn13 Sept 197911 Aug 20053
Newbridge17 Aug 19943 Aug 20054
Trengale Wood8 Jul 199422 Apr 20053
Codda8 Jul 199422 Aug 20003
Lamelgate8 Jul 19948 Sept 19974
Westerlake Spawning Beds14 Jun 199514 Jun 19951
Ninestones Spawning Beds14 Jun 199514 Jun 19951

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

1977–2026

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 8,764 measured fish were spread across different length ranges.

Smallest
1.1 cm
Lower quarter
3.4 cm
Median
4.8 cm
Upper quarter
5.8 cm
Largest
8.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Fowey

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

Brown / sea trout European eel Atlantic salmon Minnow Brook lamprey 3-spined stickleback

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 →