RiverFish

Bullhead · Cottus gobio

Bullhead in the River Upper Ouse

Largest measured bullhead: 10.4 cm

The largest bullhead measured in Environment Agency surveys of the River Upper Ouse was 10.4 cm, recorded at Westbury on 7 August 2013.

Across 749 measured bullhead, the median measured length was 6.4 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 Upper Ouse.

See bullhead records across England →

Most recent observation12 June 2025Passenham · 1 fish
Largest measured bullhead
10.4 cm
Median length
6.4 cm
Fish measured
749
Survey locations
35

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
10.4 cm7 Aug 2013Westbury137724
10.3 cm21 Jun 1988Westbury28813
10.2 cm8 Sept 2016Water Stratford149280
10 cm10 Oct 2016Thornborough Mill149785
10 cm7 Aug 2012Brackley132675
9.8 cm10 Aug 2011Newport Pagnell127338
9.8 cm16 Aug 2001Passenham30805
9.6 cm6 Sept 2017Westbury151466
9.6 cm7 Aug 2012Brackley132675
9.5 cm4 Jun 2024Brackley165464

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
Passenham14 Jul 198812 Jun 202513
Buckingham28 Mar 19943 Jun 202514
Water Stratford24 Mar 19945 Jun 20246
Brackley30 Sept 20084 Jun 20246
Oakley25 Oct 199430 Aug 202311
Stony Stratford Bypass Channel30 Jun 20168 Oct 20193
DS Wolverton Mill20 Aug 201314 Aug 20192
DS Ravenstone Mill1 Sept 201111 Oct 20172
Westbury21 Jun 19886 Sept 20177
Newport Pagnell15 Nov 19884 Sept 201713
Clifton Reynes28 Sept 199429 Aug 20175
Mill Farm Gayhurst2 Aug 19881 Nov 20166
Manor Farm Cosgrove3 May 199431 Oct 20165
Mill Farm20 Apr 199411 Oct 20165
Thornborough Mill10 Aug 198810 Oct 20166
Mount Mill Farm9 Aug 19885 Aug 201310
Turvey18 Nov 198824 Aug 20117
Pavenham20 Oct 199417 Aug 20103
Odell18 Oct 199416 Aug 20102
Radwell / Bletsoe4 Aug 20094 Aug 20091
Ravenstone Mill7 Nov 200716 Jul 20092
Wolverton Mill8 Apr 200514 May 20092
Whitfield1 Oct 20081 Oct 20081
Turweston1 Oct 20081 Oct 20081
Stony Stratford1 Nov 20011 Nov 20011
Biddenham29 Nov 198817 Nov 19973
Harrold Country Park17 Oct 199414 Nov 19972
Carlton13 Oct 199417 Oct 19972
Radclive Mill24 Mar 199430 Apr 19972
DS Passenham Weir15 Jul 198822 Apr 19972
US Mill Farm19 Apr 199417 Apr 19972
Old Mill House Buckingham29 Mar 199414 Apr 19972
Queens Park Bedford25 Nov 199425 Nov 19941
Lavendon Mill12 Oct 199412 Oct 19941
Kempston Mill6 Mar 19926 Mar 19921

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

1988–2025

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 749 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
5.4 cm
Median
6.4 cm
Upper quarter
7.5 cm
Largest
10.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Upper Ouse

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

Pike Perch Dace Roach Chub Gudgeon

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 →