RiverFish

Bullhead · Cottus gobio

Bullhead in the River Nar

Largest measured bullhead: 11.8 cm

The largest bullhead measured in Environment Agency surveys of the River Nar was 11.8 cm, recorded at Bradmoor Cottages Narborough on 4 October 2013.

Across 1,414 measured bullhead, the median measured length was 7 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 Nar.

See bullhead records across England →

Most recent observation1 April 2026Bone Mill · 23 fish
Largest measured bullhead
11.8 cm
Median length
7 cm
Fish measured
1,414
Survey locations
19

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
11.8 cm4 Oct 2013Bradmoor Cottages Narborough139158
11.8 cm10 Nov 1989Castle Acre30327
11.4 cm10 Mar 2014Castle Acre140521
11.3 cm18 Jan 1996West Lexham30350
11.3 cm19 Jan 1990Narford Hall Estate30330
11.3 cm10 Nov 1989Castle Acre30327
11.3 cm10 Nov 1989Castle Acre30327
11.3 cm10 Nov 1989Castle Acre30327
11.3 cm10 Nov 1989Castle Acre30327
11 cm11 Mar 2025West Lexham175930

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
Bone Mill1 Apr 20261 Apr 20261
Castle Acre10 Nov 19894 Mar 202626
West Lexham11 Mar 19933 Mar 202612
DS Narborough Mill26 Feb 20031 Apr 20256
Narford Hall Estate19 Jan 199010 Mar 202012
Bradmoor Cottages Narborough4 Oct 20137 Mar 20195
Manor Farm14 Mar 20036 Mar 201910
Wormegay High Bridge29 Jan 199621 Mar 20175
DS Abbey Farm Weir (Eel Monitoring)18 Jul 201220 Mar 20173
Abbey Farm19 Mar 200420 Mar 20174
Marham Intake15 Nov 198914 Mar 20177
DS Marham Sluice14 Mar 201714 Mar 20171
Setchey25 Mar 200417 Mar 20153
High Bridge Side Channel12 Mar 201512 Mar 20151
DS Narford Hall Estate3 Oct 20133 Oct 20131
Warren Farm14 Nov 198929 Mar 20125
East Lexham12 Mar 201212 Mar 20121
Saddlebow19 Apr 201019 Apr 20101
US Sluice Kings Lynn15 Apr 201015 Apr 20101

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

1989–2026

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 1,414 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
5.6 cm
Median
7 cm
Upper quarter
8.3 cm
Largest
11.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nar

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

European eel 3-spined stickleback Brown / sea trout Pike Dace Gudgeon

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 →