Bullhead · Cottus gobio

Bullhead in the River US Cam

Largest measured bullhead: 10.4 cm

The largest bullhead measured in Environment Agency surveys of the River US Cam was 10.4 cm, recorded at Sawston Paper Mill on 5 July 2013.

Across 380 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 US Cam.

See bullhead records across England →

Most recent observation3 June 2026Sawston Paper Mill · 3 fish

Largest measured bullhead: 10.4 cm
Median length: 6.4 cm
Fish measured: 380
Survey locations: 11

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
10.4 cm	5 Jul 2013	Sawston Paper Mill	136985
10.4 cm	5 Jul 2013	Sawston Paper Mill	136985
10.2 cm	5 Jul 2013	Sawston Paper Mill	136985
10.2 cm	2 Jul 2013	Littlebury	136854
10.1 cm	2 Jul 2013	Littlebury	136854
10 cm	5 Jul 2013	Sawston Paper Mill	136985
10 cm	2 Jul 2013	Littlebury	136854
10 cm	2 Jul 2013	Littlebury	136854
9.6 cm	30 Apr 2019	Sawston Paper Mill	154480
9.6 cm	4 Jul 2013	Pampisford Mill	136998

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
Sawston Paper Mill	22 Sept 1993	3 Jun 2026	7
Pampisford Mill	5 Dec 1996	2 Jun 2026	6
P.B.I (Trumpington Meadows)	16 Mar 2010	19 Mar 2025	6
Littlebury	30 Sept 1993	12 Mar 2025	4
Audley End	24 Sept 2015	24 Sept 2015	1
Hinxton	9 Dec 1996	3 Jul 2013	3
Byron's Pool Bypass Channel	1 Jun 2011	4 Jul 2012	2
Hauxton Junction	16 Mar 2010	11 Nov 2010	2
DS Hauxton Mill Bridge	16 Mar 2010	11 Nov 2010	2
Hauxton Mill Bridge	17 Sept 2008	16 Mar 2010	2
Rectory Farm	21 Sept 1993	17 Dec 1996	2

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

1993–2026

Survey records by year

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

393

094

095

496

097

098

099

000

001

002

003

004

305

006

007

108

009

1010

111

112

513

014

115

016

017

018

319

020

021

022

023

024

325

226

Fish measured by surveyors

Measured length distribution

See how the 380 measured fish were spread across different length ranges.

Smallest: 2.4 cm
Lower quarter: 5.5 cm
Median: 6.4 cm
Upper quarter: 7.4 cm
Largest: 10.4 cm

0–99 mm

372

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River US Cam

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

Roach Chub Perch Gudgeon Dace Brown / sea trout

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 →