RiverFish

Bullhead · Cottus gobio

Bullhead in the River Weaver

Largest measured bullhead: 10.2 cm

The largest bullhead measured in Environment Agency surveys of the River Weaver was 10.2 cm, recorded at Wewe10 on 8 June 2004.

Across 20 measured bullhead, the median measured length was 7.2 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 Weaver.

See bullhead records across England →

Most recent observation23 July 2026Wewe25
Largest measured bullhead
10.2 cm
Median length
7.2 cm
Fish measured
20
Survey locations
8

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
10.2 cm8 Jun 2004Wewe1081685
9.5 cm8 Jun 2004Wewe1081685
8.6 cm8 Jun 2004Wewe1081685
8.6 cm8 Jun 2004Wewe1081685
8.4 cm8 Jun 2004Wewe1081685
8 cm8 Jun 2004Wewe1081685
7.9 cm8 Jun 2004Wewe1081685
7.8 cm8 Jun 2004Wewe1081685
7.6 cm8 Jun 2004Wewe1081685
7.3 cm1 Jun 2004We1480432

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
Wewe2515 Jul 200823 Jul 20263
Wewe2413 Jul 200619 Aug 20242
Wewe0313 Aug 20146 Jun 20152
Wewe1030 Jun 199921 Jul 20083
We141 Jun 20041 Jun 20041
We2930 Jun 199930 Jun 19991
We2329 Jun 199929 Jun 19991
We2426 Jun 199926 Jun 19991

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

1999–2026

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 20 measured fish were spread across different length ranges.

Smallest
4.6 cm
Lower quarter
5.6 cm
Median
7.2 cm
Upper quarter
8.1 cm
Largest
10.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Weaver

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

Gudgeon Stone loach Roach Chub Perch 3-spined stickleback

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 →