RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the Alleviation of Low Flow (ALF) study

Largest measured 3-spined stickleback: 6.5 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the Alleviation of Low Flow (ALF) study was 6.5 cm, recorded at Gerrards Cross STW on 12 May 1999.

Across 113 measured 3-spined stickleback, the median measured length was 4.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Alleviation of Low Flow (ALF) study.

See 3-spined stickleback records across England →

Most recent observation7 November 2000Denham Country Park · 1 fish
Largest measured 3-spined stickleback
6.5 cm
Median length
4.7 cm
Fish measured
113
Survey locations
3

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
6.5 cm12 May 1999Gerrards Cross STW126116
6 cm12 May 1999Gerrards Cross STW126116
6 cm12 May 1999Gerrards Cross STW126116
6 cm6 May 1999Denham Country Park126115
5.9 cm22 Jun 2000Isle of Wight Farm126114
5.8 cm22 Jun 2000Isle of Wight Farm126114
5.8 cm22 Jun 2000Isle of Wight Farm126114
5.8 cm12 May 1999Gerrards Cross STW126116
5.7 cm12 May 1999Gerrards Cross STW126116
5.7 cm12 May 1999Gerrards Cross STW126116

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
Denham Country Park6 May 19997 Nov 20002
Isle of Wight Farm22 Jun 200024 Oct 20002
Gerrards Cross STW12 May 199912 May 19991

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

1999–2000

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 113 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
4.4 cm
Median
4.7 cm
Upper quarter
5 cm
Largest
6.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Alleviation of Low Flow (ALF) study

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

Bullhead 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 →