3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the Stevenage Brook

Largest measured 3-spined stickleback: 8 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the Stevenage Brook was 8 cm, recorded at Broadhall Way on 10 April 2012.

Across 284 measured 3-spined stickleback, the median measured length was 5 cm.

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

See 3-spined stickleback records across England →

Most recent observation9 April 2026Elder Way

Largest measured 3-spined stickleback: 8 cm
Median length: 5 cm
Fish measured: 284
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.

Length	Survey date	Survey location	Survey ID
8 cm	10 Apr 2012	Broadhall Way	131057
7.3 cm	10 Apr 2012	Elder Way	131056
7.1 cm	10 Apr 2012	Broadhall Way	131057
6.9 cm	10 Apr 2012	Broadhall Way	131057
6.9 cm	10 Apr 2012	Broadhall Way	131057
6.8 cm	10 Apr 2012	Broadhall Way	131057
6.7 cm	10 Apr 2012	Broadhall Way	131057
6.6 cm	10 Apr 2012	Elder Way	131056
6.6 cm	10 Apr 2012	Elder Way	131056
6.5 cm	10 Apr 2012	Broadhall Way	131057

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
Elder Way	10 Apr 2012	9 Apr 2026	3
Broadhall Way	10 Apr 2012	9 Apr 2026	3
British Aerospace Sportsground (Bragbury End)	26 Oct 1993	26 Oct 1993	1
Frogmore Hall	10 Sept 1993	10 Sept 1993	1

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

1993–2026

Survey records by year

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

293

094

095

096

097

098

099

000

001

002

003

004

005

006

007

008

009

010

011

212

013

014

015

016

017

218

019

020

021

022

023

024

025

226

Fish measured by surveyors

Measured length distribution

See how the 284 measured fish were spread across different length ranges.

Smallest: 2.1 cm
Lower quarter: 4.3 cm
Median: 5 cm
Upper quarter: 5.6 cm
Largest: 8 cm

0–99 mm

284

Lengths are direct survey measurements rather than anglers’ catches.

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 →