RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Colne

Largest measured 3-spined stickleback: 5.1 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Colne was 5.1 cm, recorded at Denham on 1 December 2004.

Across 19 measured 3-spined stickleback, the median measured length was 2.8 cm.

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

See 3-spined stickleback records across England →

Most recent observation24 July 2025Uxbridge
Largest measured 3-spined stickleback
5.1 cm
Median length
2.8 cm
Fish measured
19
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.

LengthSurvey dateSurvey locationSurvey ID
5.1 cm1 Dec 2004Denham83313
4.6 cm21 Jul 2004Watford M1 link road80609
4.1 cm2 Apr 2015Colney Heath144500
3.7 cm2 Apr 2015Colney Heath144500
3.4 cm3 Jul 2004Springwell Lane81495
3.1 cm2 Apr 2015Colney Heath144500
3 cm2 Apr 2015Colney Heath144500
3 cm28 Jul 2005Uxbridge85239
3 cm1 Dec 2004Denham83313
2.8 cm11 Jul 2003Wall Hall76367

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
Uxbridge23 Jul 200324 Jul 20257
Watford M1 link road21 Jul 200427 Jun 20244
Stanwell Moor21 May 202421 May 20241
Springwell Lane17 Jul 200322 Jun 20234
Colney Heath2 Apr 20152 Apr 20151
Drop Lane25 Jul 200625 Jul 20061
Denham1 Dec 20041 Dec 20041
Wall Hall11 Jul 200311 Jul 20031

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

2003–2025

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 19 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
2.5 cm
Median
2.8 cm
Upper quarter
3.3 cm
Largest
5.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Colne

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

Chub Perch Roach Pike Dace Gudgeon

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 →