Bullhead · Cottus gobio

Bullhead in the River Ouse

Largest measured bullhead: 10 cm

The largest bullhead measured in Environment Agency surveys of the River Ouse was 10 cm, recorded at Fletching Mill Upstream on 27 June 2013.

Across 590 measured bullhead, the median measured length was 5.1 cm.

Surveyors recorded weights for 464 bullhead. The median was 0 oz (0.001 kg) and the largest recorded weight was 0.5 oz (0.013 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Ouse.

See bullhead records across England →

Most recent observation25 July 2024Fletching Mill Upstream · 12 fish

Largest measured bullhead: 10 cm
Median length: 5.1 cm
Fish measured: 590
Survey locations: 13

Individual EA measurements

Largest measured bullhead

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
10 cm	27 Jun 2013	Fletching Mill Upstream	136966
9.5 cm	27 Jun 2013	Sloop	136758
9.5 cm	15 Oct 2010	Sloop	124695
9.4 cm	1 Aug 2003	Sloop	76612
9.3 cm	24 Jul 2024	Sloop	165937
9.3 cm	27 Jun 2013	Fletching Mill Upstream	136966
9.2 cm	24 Aug 2006	Sloop	102370
9.2 cm	1 Aug 2003	Sloop	76612
9.1 cm	11 Jul 2013	Sheffield Bridge	137099
9.1 cm	17 Aug 2004	Upper Ryelands	81344

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 surveyed	First recorded	Last recorded	Visits finding bullhead
Sheffield Bridge	29 Aug 2001	25 Jul 2024	15
Fletching Mill Upstream	20 Oct 2010	25 Jul 2024	6
Sloop	13 Aug 2002	24 Jul 2024	13
East Mascalls Bridge	23 Aug 2005	24 Jul 2024	6
Slaugham	26 Sept 2006	12 Sept 2018	3
Avins Bridge	12 Aug 2002	29 Apr 2014	3
Upper Ryelands	15 Aug 2001	1 Oct 2013	8
Sloop Weir Upstream	25 Oct 2011	25 Oct 2011	1
Sloop Weir Downstream	25 Oct 2011	25 Oct 2011	1
Fletching Mill Downstream	28 Oct 2009	11 Jul 2011	3
Sharpsbridge	8 Aug 2002	29 Oct 2009	7
Ardingly College	6 Jul 1998	23 Sept 2003	2
Cherry lane	11 Aug 2003	11 Aug 2003	1

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

1998–2024

Survey records by year

Each bar shows how many survey visits recorded bullhead that year.

198

099

000

201

502

603

404

505

606

507

108

509

410

611

112

413

114

315

016

417

118

019

020

021

022

123

424

Fish measured by surveyors

Measured length distribution

See how the 590 measured fish were spread across different length ranges.

Smallest: 0.3 cm
Lower quarter: 4.1 cm
Median: 5.1 cm
Upper quarter: 7 cm
Largest: 10 cm

0–99 mm

589

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 464 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0 oz (0.001 kg)
Median: 0 oz (0.001 kg)
Upper quarter: 0.1 oz (0.004 kg)
Heaviest: 0.5 oz (0.013 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Ouse

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

European eel Perch Roach Dace Gudgeon Stone loach

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 →