RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Mermaid

Largest measured 3-spined stickleback: 6.7 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Mermaid was 6.7 cm, recorded at Marsham , Mermaid's Head meadows on 30 January 2004.

Across 28 measured 3-spined stickleback, the median measured length was 4 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 Mermaid.

See 3-spined stickleback records across England →

Most recent observation16 March 2018Brampton , d/s B1254 bridge · 5 fish
Largest measured 3-spined stickleback
6.7 cm
Median length
4 cm
Fish measured
28
Survey locations
4

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
6.7 cm30 Jan 2004Marsham , Mermaid's Head meadows99899
5 cm30 Jan 2004Marsham , Mermaid's Head meadows99899
4.8 cm20 Apr 2016Marsham , Mermaid's Head meadows148209
4.8 cm30 Jan 2004Marsham, Top Farm meadows99878
4.8 cm30 Jan 2004Marsham, Top Farm meadows99878
4.7 cm30 Jan 2004Marsham , Mermaid's Head meadows99899
4.6 cm30 Jan 2004Marsham, Top Farm meadows99878
4.5 cm16 Mar 2018Brampton , d/s B1254 bridge152510
4.5 cm22 Jan 2010Marsham , Mermaid's Head meadows121186
4.3 cm20 Apr 2016Marsham , Mermaid's Head meadows148209

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
Brampton , d/s B1254 bridge21 Jan 201016 Mar 20183
Marsham , Mermaid's Head meadows30 Jan 200420 Apr 20163
Marsham, Top Farm meadows30 Jan 200430 Jan 20041
Aylsham , opp. Cherry Tree Farm (Fengate)30 Jan 200430 Jan 20041

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

2004–2018

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 28 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
3.7 cm
Median
4 cm
Upper quarter
4.5 cm
Largest
6.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mermaid

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

Brown / sea trout Stone loach

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 →