3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the Turkey Brook

Largest measured 3-spined stickleback: 5.9 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the Turkey Brook was 5.9 cm, recorded at Forty Hall on 16 April 2014.

Across 113 measured 3-spined stickleback, the median measured length was 3.8 cm.

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

See 3-spined stickleback records across England →

Most recent observation30 June 2026Forty Hall

Largest measured 3-spined stickleback: 5.9 cm
Median length: 3.8 cm
Fish measured: 113
Survey locations: 8

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
5.9 cm	16 Apr 2014	Forty Hall	140665
5.1 cm	3 Dec 2013	d/s Cuffley Brook confluence	140282
5 cm	3 Dec 2013	Forty Hall	140281
4.9 cm	16 Apr 2014	Forty Hall	140665
4.8 cm	27 Nov 2013	Rotenone neutralisation zone	140279
4.7 cm	16 Apr 2014	d/s Cuffley Brook confluence	140666
4.6 cm	16 Apr 2014	d/s Cuffley Brook confluence	140666
4.6 cm	16 Apr 2014	d/s Cuffley Brook confluence	140666
4.6 cm	16 Apr 2014	d/s Cuffley Brook confluence	140666
4.6 cm	16 Apr 2014	Forty Hall	140665

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
Forty Hall	4 May 2006	30 Jun 2026	9
Whitewebbs Golf Course	13 Dec 2013	21 Oct 2019	5
12th T at Golf Club	16 May 2006	31 Oct 2018	3
Albany Park	4 Dec 2013	9 Oct 2017	4
d/s Cuffley Brook confluence	3 Dec 2013	5 Oct 2015	5
Rotenone neutralisation zone 2	27 Nov 2013	27 Nov 2013	1
Rotenone neutralisation zone	27 Nov 2013	27 Nov 2013	1
Forty Hall TMG	26 Mar 2009	20 Apr 2010	2

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

2006–2026

Survey records by year

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

206

007

008

109

110

011

212

613

814

515

016

117

218

119

020

021

022

023

024

025

126

Fish measured by surveyors

Measured length distribution

See how the 113 measured fish were spread across different length ranges.

Smallest: 2.2 cm
Lower quarter: 3.3 cm
Median: 3.8 cm
Upper quarter: 4.4 cm
Largest: 5.9 cm

0–99 mm

113

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Turkey Brook

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

Minnow Stone loach Roach Bullhead Gudgeon 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 →