RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Ash

Largest measured 3-spined stickleback: 5.4 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Ash was 5.4 cm, recorded at Easeneye Weir Removal on 23 October 2007.

Across 48 measured 3-spined stickleback, the median measured length was 3.3 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 Ash.

See 3-spined stickleback records across England →

Most recent observation18 September 2025Watersplace Farm
Largest measured 3-spined stickleback
5.4 cm
Median length
3.3 cm
Fish measured
48
Survey locations
11

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
5.4 cm23 Oct 2007Easeneye Weir Removal108812
4.8 cm23 Oct 2007Easeneye Weir Removal108812
4.6 cm23 Oct 2007Easeneye Weir Removal108812
4.4 cm16 Oct 2007Watersplace Farm107896
4.4 cm16 Oct 2007Watersplace Farm107896
4.3 cm29 Oct 2021Watersplace Farm160894
4.3 cm23 Oct 2007Easeneye Weir Removal108812
4.3 cm16 Oct 2007Watersplace Farm107896
4.2 cm29 Oct 2021Watersplace Farm160894
4.2 cm29 Oct 2021Watersplace Farm160894

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
Watersplace Farm10 Oct 200318 Sept 202512
Wareside Fully Quantitative30 Sept 201212 Sept 20246
Hollycross Road22 Sept 201219 Sept 20233
Much Hadham Fully Quantitative30 Sept 201230 Sept 20121
Easeneye Weir Removal23 Oct 200723 Oct 20071
Much Hadham30 Jun 200630 Jun 20061
Upstream Blakeswere Widford29 Jun 200629 Jun 20061
Wareside28 Jun 200628 Jun 20061
Holly cross rd/water place farm22 Jun 200622 Jun 20061
Blakesware estate enhancement downstream7 Jun 20057 Jun 20051
Blakesware Estate13 Oct 200313 Oct 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 48 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
2.6 cm
Median
3.3 cm
Upper quarter
4.1 cm
Largest
5.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ash

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

Brown / sea trout Bullhead Minnow Stone loach Brook lamprey Roach

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 →