RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Aln

Largest measured 3-spined stickleback: 5.6 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Aln was 5.6 cm, recorded at Eglingham Burn at Shipley on 1 August 2009.

Across 2 measured 3-spined stickleback, the median measured length was 4.3 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 Aln.

See 3-spined stickleback records across England →

Most recent observation23 June 2026River Aln at Lady's Well
Largest measured 3-spined stickleback
5.6 cm
Median length
4.3 cm
Fish measured
2
Survey locations
26

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
5.6 cm1 Aug 2009Eglingham Burn at Shipley119676
3 cm1 Aug 2009Eglingham Burn at Shipley119676

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
River Aln at Lady's Well22 Sept 199323 Jun 20266
River Aln at Bolton Mill23 Sept 199323 Jun 202616
Eglingham Burn at Shipley28 Jul 200323 Jun 202611
Edlingham Burn at Battle Bridge29 Sept 199523 Jun 202620
Cawledge Burn site #216 Jul 202416 Jul 20241
Shipley burn at Aln Confluence8 Jul 20248 Jul 20241
Denwick Burn at Golden Moor Farm13 Jul 20058 Jul 20243
River Aln at Old Hawkhill Ford13 Jul 20053 Jul 20243
River Aln at Abberwick Mill.6 Aug 20011 Jul 20243
River Aln at Abberwick Ford3 Aug 20121 Jul 20243
Shawdon Burn13 Sept 199626 Jun 20246
River Aln at Whittingham16 Sept 199625 Jun 20243
Coe Burn29 Sept 199725 Jun 20244
River Aln Upstream of Whittingham Ford23 Sept 19932 Jul 20194
Coe Burn at Low Broome Park20 Jul 20052 Jul 20192
River Aln at Little Ryle11 Sept 201411 Sept 20141
River Aln at Bridge of Aln22 Sept 19934 Jul 20135
Aln at Bridge End18 Sept 201218 Sept 20121
Shipley Burn29 Sept 19953 Sept 20123
Callally Burn, callally mill2 Sept 20122 Sept 20121
River Aln at Filberthaugh21 Sept 199310 Jul 20065
Cawledge Burn25 Jul 200525 Jul 20051
Edlingham Burn at Lemmington22 Jul 200522 Jul 20051
Coe Burn at Low LearChild12 Sept 199614 Jul 20052
River Aln at Lesbury8 Aug 20018 Aug 20011
Callally Burn at Whittingham7 Oct 19977 Oct 19971

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.

Fish measured by surveyors

Measured length distribution

See how the 2 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
3.7 cm
Median
4.3 cm
Upper quarter
5 cm
Largest
5.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Aln

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

Brown / sea trout European eel Stone loach Atlantic salmon Minnow River lamprey

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 →