RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Eton College

Largest measured 3-spined stickleback: 4 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Eton College was 4 cm, recorded at Eton Downstream Fry on 24 August 2011.

Across 34 measured 3-spined stickleback, the median measured length was 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 Eton College.

See 3-spined stickleback records across England →

Most recent observation4 September 2025Eton Downstream Fry · 9 fish
Largest measured 3-spined stickleback
4 cm
Median length
3 cm
Fish measured
34
Survey locations
2

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
4 cm24 Aug 2011Eton Downstream Fry130086
3.7 cm24 Aug 2011Eton Downstream Fry130086
3.7 cm24 Aug 2011Eton Downstream Fry130086
3.5 cm24 Aug 2011Eton Downstream Fry130086
3.5 cm24 Aug 2011Eton Downstream Fry130086
3.3 cm24 Aug 2011Eton Downstream Fry130086
3.3 cm24 Aug 2011Eton Downstream Fry130086
3.3 cm18 Aug 2010Eton Upstream Fry124540
3.2 cm23 Aug 2017Eton Downstream Fry151491
3.2 cm24 Aug 2011Eton Downstream Fry130086

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
Eton Downstream Fry18 Aug 20104 Sept 20256
Eton Upstream Fry18 Aug 201018 Aug 20101

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

2010–2025

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 34 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
2.5 cm
Median
3 cm
Upper quarter
3.2 cm
Largest
4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Eton College

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

Roach Minnow Gudgeon Dace Chub Bleak

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 →