RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Nar

Largest measured 3-spined stickleback: 6.3 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Nar was 6.3 cm, recorded at Castle Acre on 13 March 2012.

Across 242 measured 3-spined stickleback, the median measured length was 3.7 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 3-spined stickleback records across England →

Most recent observation11 March 2025West Lexham · 1 fish
Largest measured 3-spined stickleback
6.3 cm
Median length
3.7 cm
Fish measured
242
Survey locations
18

Individual EA measurements

Largest measured 3-spined stickleback

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

LengthSurvey dateSurvey locationSurvey ID
6.3 cm13 Mar 2012Castle Acre130160
5.9 cm13 Mar 2012Castle Acre130160
5.8 cm25 Mar 2013Castle Acre135794
5.3 cm12 Mar 2012East Lexham130155
5.3 cm18 Jan 1996West Lexham30350
5.3 cm18 Jan 1996West Lexham30350
5.3 cm18 Jan 1996West Lexham30350
5.3 cm18 Jan 1996West Lexham30350
5.3 cm18 Jan 1996West Lexham30350
5.3 cm18 Jan 1996West Lexham30350

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where 3-spined stickleback were found

Each point marks a survey location with at least one 3-spined stickleback 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 3-spined stickleback
West Lexham11 Mar 199311 Mar 20257
Castle Acre10 Mar 19935 Mar 20259
Bradmoor Cottages Narborough4 Oct 20137 Mar 20192
Wormegay High Bridge20 Apr 201021 Mar 20173
White House Farm Kings Lynn1 Apr 20151 Apr 20151
Marham Intake12 Apr 201031 Mar 20153
Saddlebow19 Apr 201026 Mar 20152
Abbey Farm25 Mar 201016 Mar 20152
High Bridge Side Channel22 Apr 201012 Mar 20152
Manor Farm26 Mar 20105 Mar 20155
DS Abbey Farm Weir (Eel Monitoring)18 Jul 201223 Jul 20142
Mileham (New Channel)2 Oct 20132 Oct 20131
Mileham (Old Channel)18 Sept 201218 Sept 20121
East Lexham6 Apr 201012 Mar 20122
DS Narborough Mill16 Feb 201116 Feb 20111
Setchey16 Apr 201016 Apr 20101
US Sluice Kings Lynn15 Apr 201015 Apr 20101
Warren Farm7 Apr 20107 Apr 20101

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

1993–2025

Survey records by year

Each bar shows how many survey visits recorded 3-spined stickleback that year.

Fish measured by surveyors

Measured length distribution

See how the 242 measured fish were spread across different length ranges.

Smallest
1.4 cm
Lower quarter
3.2 cm
Median
3.7 cm
Upper quarter
4.2 cm
Largest
6.3 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 Bullhead 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 →