RiverFish

Bullhead · Cottus gobio

Bullhead in the Chess Stream

Largest measured bullhead: 9 cm

The largest bullhead measured in Environment Agency surveys of the Chess Stream was 9 cm, recorded at North Park Farm Q on 17 December 1997.

Across 37 measured bullhead, the median measured length was 4.9 cm.

Surveyors recorded weights for 37 bullhead. The median was 0.1 oz (0.002 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 Chess Stream.

See bullhead records across England →

Most recent observation13 May 2014Park Farm · 16 fish
Largest measured bullhead
9 cm
Median length
4.9 cm
Fish measured
37
Survey locations
4

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 cm17 Dec 1997North Park Farm Q72640
7.2 cm20 Aug 2002North Park Farm sq55331
6.9 cm20 Aug 2002North Park Farm sq55331
6.8 cm8 Aug 2006Parsonage Wood102302
6.7 cm20 Aug 2002North Park Farm sq55331
6.5 cm20 Aug 2002North Park Farm sq55331
6.2 cm20 Aug 2002North Park Farm sq55331
6 cm17 Dec 1997North Park Farm Q72640
5.9 cm20 Aug 2002North Park Farm sq55331
5.7 cm19 Sept 2007Parsonage Wood107234

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
Park Farm13 May 201413 May 20141
Parsonage Wood8 Aug 200619 Sept 20072
North Park Farm sq20 Aug 200220 Aug 20021
North Park Farm Q17 Dec 199717 Dec 19971

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

1997–2014

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 37 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
3 cm
Median
4.9 cm
Upper quarter
5.7 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 37 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 oz (0.001 kg)
Median
0.1 oz (0.002 kg)
Upper quarter
0.1 oz (0.003 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 Chess Stream

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

European eel Gudgeon Stone loach Roach 3-spined stickleback 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 →