RiverFish

Bullhead · Cottus gobio

Bullhead in the River Derwent

Largest measured bullhead: 10.6 cm

The largest bullhead measured in Environment Agency surveys of the River Derwent was 10.6 cm, recorded at Nooning Lane on 1 July 2010.

Across 449 measured bullhead, the median measured length was 5 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 Derwent.

See bullhead records across England →

Most recent observation19 September 2024Nooning Lane Net · 4 fish
Largest measured bullhead
10.6 cm
Median length
5 cm
Fish measured
449
Survey locations
22

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
10.6 cm1 Jul 2010Nooning Lane122567
10.2 cm1 Jul 2010Nooning Lane122567
9.3 cm3 Jul 2013Hathersage139763
9.1 cm15 Aug 2014Yorkshire Bridge143530
9 cm13 Sept 2018Hathersage153354
8.9 cm25 Jul 2017Nooning Lane151011
8.7 cm3 Jul 2013Hathersage139763
8.6 cm3 Jul 2013Hathersage139763
8.6 cm3 Jul 2013Cromford137104
8.5 cm19 Aug 2014Hathersage144237

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
Nooning Lane Net19 Sept 202419 Sept 20241
Duffield Bridge4 Sept 201426 Aug 20226
Cromford Willersley Castle Salmon parr26 Aug 202226 Aug 20221
Yorkshire Bridge31 Jan 199614 Sept 20189
Hathersage29 Jan 199813 Sept 201813
Belper Weir Salmon Parr17 Oct 201710 Sept 20182
Cromford30 Sept 20026 Sept 20188
Cromford Salmon Parr4 Sept 201417 Oct 20174
Nooning Lane23 Sept 200824 Aug 20176
Chub Alley1 Jul 201025 Jul 20174
Borrowash Fish Pass Pool125 Feb 201616 Sept 20162
Borrowash Fish Pass Pool 226 Feb 201626 Feb 20161
Raynesway Weir Pool25 Sept 201525 Sept 20151
Borrowash Black Weir25 Sept 201525 Sept 20151
DS Longbridge Weir4 Sept 201414 Sept 20152
Chub Alley Net3 Aug 20123 Aug 20121
Grindleford18 Oct 201018 Oct 20101
DS Calver Weir18 Oct 201018 Oct 20101
Peckwash Mill1 Sept 20101 Sept 20101
Matlock Bath26 Feb 19982 Sept 20052
Baslow15 Jun 200515 Jun 20051
Alvaston17 Feb 199817 Feb 19981

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

1996–2024

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 449 measured fish were spread across different length ranges.

Smallest
1.5 cm
Lower quarter
3.7 cm
Median
5 cm
Upper quarter
6.7 cm
Largest
10.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent

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

Brown / sea trout Minnow Grayling Chub Stone loach Perch

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 →