Bullhead · Cottus gobio

Bullhead in the River Redlake

Largest measured bullhead: 9.2 cm

The largest bullhead measured in Environment Agency surveys of the River Redlake was 9.2 cm, recorded at Redlake Farm on 29 August 1991.

Across 17 measured bullhead, the median measured length was 5.8 cm.

Surveyors recorded weights for 17 bullhead. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.5 oz (0.013 kg).

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

See bullhead records across England →

Most recent observation1 October 1991Erdwicke Farm · 1 fish

Largest measured bullhead: 9.2 cm
Median length: 5.8 cm
Fish measured: 17
Survey locations: 3

Individual EA measurements

Largest measured bullhead

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
9.2 cm	29 Aug 1991	Redlake Farm	80667
9.1 cm	1 Oct 1991	Erdwicke Farm	80666
8.4 cm	1 Oct 1991	Redhouse Farm	80664
8 cm	1 Oct 1991	Redhouse Farm	80664
7.6 cm	1 Oct 1991	Redhouse Farm	80664
7.5 cm	29 Aug 1991	Redlake Farm	80667
7.1 cm	1 Oct 1991	Redhouse Farm	80664
6.1 cm	1 Oct 1991	Redhouse Farm	80664
5.8 cm	1 Oct 1991	Redhouse Farm	80664
5.5 cm	1 Oct 1991	Redhouse Farm	80664

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 surveyed	First recorded	Last recorded	Visits finding bullhead
Redhouse Farm	1 Oct 1991	1 Oct 1991	1
Erdwicke Farm	1 Oct 1991	1 Oct 1991	1
Redlake Farm	29 Aug 1991	29 Aug 1991	1

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

1991–1991

Survey records by year

Each bar shows how many survey visits recorded bullhead that year.

391

Fish measured by surveyors

Measured length distribution

See how the 17 measured fish were spread across different length ranges.

Smallest: 4.1 cm
Lower quarter: 4.8 cm
Median: 5.8 cm
Upper quarter: 7.6 cm
Largest: 9.2 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 17 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 (0.003 kg)
Upper quarter: 0.2 oz (0.006 kg)
Heaviest: 0.5 oz (0.013 kg)

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

More fish in this river

Explore the River Redlake

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

European eel

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 →