RiverFish

Bullhead · Cottus gobio

Bullhead in the River Rivelin

Largest measured bullhead: 11.9 cm

The largest bullhead measured in Environment Agency surveys of the River Rivelin was 11.9 cm, recorded at Downstream Mill Dam on 1 August 2003.

Across 2,836 measured bullhead, the median measured length was 6.1 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 Rivelin.

See bullhead records across England →

Most recent observation20 August 2025Allotments Bridge
Largest measured bullhead
11.9 cm
Median length
6.1 cm
Fish measured
2,836
Survey locations
9

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
11.9 cm1 Aug 2003Downstream Mill Dam109434
11.3 cm1 Aug 2003Upstream Roscoe Bridge109446
11.1 cm1 Aug 2003Upstream Roscoe Bridge109446
11.1 cm1 Aug 2003Coppice Cottages109431
10.8 cm1 Aug 2003Allotments Bridge109447
10.5 cm1 Aug 2003Downstream Mill Dam109434
10.4 cm14 Sept 2011Rivelin Mill128676
10.2 cm31 Aug 2004Upstream Roscoe Bridge83920
10.2 cm1 Aug 2003Glen Bridge109439
10.2 cm1 Aug 2003Downstream Mill Dam109434

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
Allotments Bridge1 Aug 200320 Aug 202517
Rivelin Mill6 Aug 200930 Aug 20173
Upstream Roscoe Bridge1 Aug 200311 Aug 20097
Havelock Dam5 Oct 199310 Aug 20098
Glen Bridge1 Aug 200310 Aug 20097
Downstream Mill Dam1 Aug 200310 Aug 20097
Upstream Coppice Cottages29 Aug 20074 Aug 20093
Hospital12 Sept 20004 Aug 20093
Coppice Cottages1 Aug 20034 Aug 20097

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

1993–2025

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 2,836 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
5.1 cm
Median
6.1 cm
Upper quarter
7.1 cm
Largest
11.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Rivelin

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

Brown / sea trout Stone loach Brook lamprey 3-spined stickleback Perch Minnow

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 →