RiverFish

Bullhead · Cottus gobio

Bullhead in the River Stour

Largest measured bullhead: 11.1 cm

The largest bullhead measured in Environment Agency surveys of the River Stour was 11.1 cm, recorded at Anchor Bridge on 5 September 2024.

Across 1,991 measured bullhead, the median measured length was 6 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 Stour.

See bullhead records across England →

Most recent observation11 August 2025Mill Meadow · 18 fish
Largest measured bullhead
11.1 cm
Median length
6 cm
Fish measured
1,991
Survey locations
44

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
11.1 cm5 Sept 2024Anchor Bridge168700
11.1 cm18 Sept 1997Great Bradley (headwater)13714
10.6 cm22 Jul 2005Bakers Mill A85661
10.6 cm24 Oct 1988Rats Castle13564
9.9 cm19 Jul 2013Pitmire A138627
9.8 cm7 Aug 2024Wormingford Mill168720
9.8 cm17 Jul 2017Pitmire A151660
9.7 cm7 Aug 2024Wormingford Mill168720
9.7 cm19 Jul 2013Pitmire A138627
9.6 cm5 Sept 2012Liston Mill134303

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
Mill Meadow4 Oct 198811 Aug 202515
Bures Mill29 Jul 19975 Aug 202516
Lamarsh FGS A21 Jul 201130 Jul 202510
Pitmire A11 Aug 200929 Jul 202513
Anchor Bridge22 Jul 198824 Jul 202519
Higham Hall3 Aug 201123 Jul 202512
Bures Bridge A2 Aug 200617 Jul 202510
Baythorne End17 Sept 20098 Oct 20246
Rats Castle24 Oct 198823 Sept 202415
Great Thurlow18 Sept 202418 Sept 20241
Bower Hall18 Oct 19853 Sept 202410
Kedington Radial Gate17 Sept 201228 Aug 20243
Wixoe Pumping Station19 Sept 201227 Aug 20243
Mill Farm Clare3 Oct 198523 Aug 202411
Bush Boake Allen19 Sept 199114 Aug 202411
Boxted Mill21 Jul 200313 Aug 202411
Wormingford Mill15 Jul 20097 Aug 20246
Pentlow Mill9 Sept 199131 Jul 20247
Wiston Mill2 Aug 201217 Jul 20242
Downstream Dedham Mill4 Jul 20063 Jul 20246
Tendring Hall7 Jul 201125 Jun 20246
Fen Bridge3 Jul 200620 Jun 202411
Upstream Dedham Mill20 Jul 201219 Jun 20244
Stratford13 Jul 201217 Jun 20245
Clare Mill21 Oct 19885 Nov 20214
Liston Mill26 Sept 19855 Oct 201810
Shalford Weir28 Sept 19889 Aug 20167
Wissington25 Jul 20072 Aug 20168
Stoke By Clare4 Sept 19972 Sept 20155
Langham Intake14 Jul 19883 Aug 20104
Bakers Mill A21 Jun 200429 Jul 20105
Little Thurlow28 Sept 200928 Sept 20091
Mill Green Radial Gate25 Oct 198815 Sept 20094
Pentlow Street18 Oct 198821 Aug 20096
Kedington FGS29 Sept 200321 Aug 20092
Shalford Meadow5 Aug 20095 Aug 20091
Brantham Lock22 Jun 200922 Jun 20091
Great Bradley (headwater)18 Sept 199717 Oct 20064
Little Wratting1 Oct 200321 Sept 20062
Wick Farm7 Jul 20037 Jul 20031
Dedham (Old) River18 Jun 200318 Jun 20031
Glemsford Pits24 Nov 199424 Nov 19941
Brundon (River Stour Middle)5 Oct 19885 Oct 19881
Rodbridge Park25 Sept 198525 Sept 19851

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

1985–2025

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 1,991 measured fish were spread across different length ranges.

Smallest
2.3 cm
Lower quarter
4.9 cm
Median
6 cm
Upper quarter
7 cm
Largest
11.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Stour

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

Roach European eel Perch Pike Chub Dace

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 →