3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Fynn

Largest measured 3-spined stickleback: 7.3 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Fynn was 7.3 cm, recorded at Witnesham Hall on 9 April 1998.

Across 281 measured 3-spined stickleback, the median measured length was 3.9 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 Fynn.

See 3-spined stickleback records across England →

Most recent observation7 March 2017Martlesham Bridge · 15 fish

Largest measured 3-spined stickleback: 7.3 cm
Median length: 3.9 cm
Fish measured: 281
Survey locations: 5

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.

Length	Survey date	Survey location	Survey ID
7.3 cm	9 Apr 1998	Witnesham Hall	13453
7 cm	9 Apr 1998	Witnesham Hall	13453
6.3 cm	9 Apr 1998	Witnesham Hall	13453
6.2 cm	4 Feb 2011	Little Bealings Bridge	125902
6.2 cm	7 Apr 1998	Martlesham Bridge	13456
6 cm	9 Feb 2006	Little Bealings Bridge	90063
6 cm	9 Apr 1998	Witnesham Hall	13453
6 cm	9 Apr 1998	Witnesham Hall	13453
6 cm	9 Apr 1998	Witnesham Hall	13453
6 cm	6 Apr 1998	Tuddenham	13454

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 surveyed	First recorded	Last recorded	Visits finding 3-spined stickleback
Tuddenham	6 Apr 1998	7 Mar 2017	4
Martlesham Bridge	7 Apr 1998	7 Mar 2017	3
Witnesham Hall	9 Apr 1998	9 Feb 2011	3
Little Bealings Bridge	6 Apr 1998	4 Feb 2011	3
Special Survey MB	10 Oct 2008	10 Oct 2008	1

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

1998–2017

Survey records by year

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

498

099

000

001

002

003

004

005

306

007

108

009

010

411

012

013

014

015

016

217

Fish measured by surveyors

Measured length distribution

See how the 281 measured fish were spread across different length ranges.

Smallest: 2.3 cm
Lower quarter: 3.3 cm
Median: 3.9 cm
Upper quarter: 4.6 cm
Largest: 7.3 cm

0–99 mm

281

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Fynn

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

Stone loach European eel 10-spined stickleback Brown / sea trout Flounder

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 →