RiverFish

Bullhead · Cottus gobio

Bullhead in the Main River Yeo

Largest measured bullhead: 9 cm

The largest bullhead measured in Environment Agency surveys of the Main River Yeo was 9 cm, recorded at Upstream confl. Sherborne Lake Stream on 29 July 1993.

Across 426 measured bullhead, the median measured length was 5.3 cm.

Surveyors recorded weights for 48 bullhead. The median was 0.2 oz (0.005 kg) and the largest recorded weight was 0.6 oz (0.016 kg).

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

See bullhead records across England →

Most recent observation21 August 2024Mudford
Largest measured bullhead
9 cm
Median length
5.3 cm
Fish measured
426
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.

LengthSurvey dateSurvey locationSurvey ID
9 cm29 Jul 1993Upstream confl. Sherborne Lake Stream79797
9 cm29 Jul 1993Upstream confl. Sherborne Lake Stream79797
9 cm28 Jul 1993Honeycombe Farm79801
8.9 cm21 Jul 2010Sherborne STW123041
8.8 cm21 Jul 2010Sherborne STW123041
8.7 cm14 Jul 2011Yeovil Bridge (Te)127172
8.4 cm25 Sept 2013Bradford Abbas (Te)138897
8.4 cm21 Jul 2010Sherborne STW123041
8.2 cm29 Jul 1993Upstream confl. Sherborne Lake Stream79797
8.1 cm29 Jul 1993Upstream confl. Sherborne Lake Stream79797

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
Mudford20 Jun 200721 Aug 20243
Yeovil Bridge (Te)5 Aug 200317 Jul 20149
Bradford Abbas (Te)23 Jul 199325 Sept 20133
Goathill Higher16 Aug 201016 Aug 20101
Sherborne STW21 Jul 201021 Jul 20101
Thornford14 Jul 201014 Jul 20101
Downstream Sherborne Lake (Te)4 Jun 200323 Jun 20053
Clifton Maybank (Te)25 Aug 200425 Aug 20041
Upstream confl. Sherborne Lake Stream29 Jul 199329 Jul 19931
Honeycombe Farm28 Jul 199328 Jul 19931
Downstream Pen Mill Gauging Station20 Jul 199320 Jul 19931
Downstream Yeovilton Weir6 Jul 19936 Jul 19931
Downstream Hainbury Mill23 Jun 199323 Jun 19931

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

1993–2024

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 426 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
4.5 cm
Median
5.3 cm
Upper quarter
6.2 cm
Largest
9 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 48 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
0.1 oz (0.003 kg)
Median
0.2 oz (0.005 kg)
Upper quarter
0.3 oz (0.009 kg)
Heaviest
0.6 oz (0.016 kg)

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

More fish in this river

Explore the Main River Yeo

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

Gudgeon European eel Chub Roach Dace 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 →