RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Leen

Largest measured 3-spined stickleback: 6.6 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Leen was 6.6 cm, recorded at Q.M.C. on 6 July 2011.

Across 13 measured 3-spined stickleback, the median measured length was 3.1 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 Leen.

See 3-spined stickleback records across England →

Most recent observation7 July 2026Bobbers Mill
Largest measured 3-spined stickleback
6.6 cm
Median length
3.1 cm
Fish measured
13
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
6.6 cm6 Jul 2011Q.M.C.126852
6.5 cm6 Jul 2011Q.M.C.126852
6.3 cm6 Jul 2011Q.M.C.126852
6.2 cm6 Jul 2011Q.M.C.126852
5.6 cm6 Jul 2011Q.M.C.126852
3.3 cm6 Jul 2011Q.M.C.126852
3.1 cm6 Jul 2011Q.M.C.126852
3 cm6 Jul 2011Q.M.C.126852
2.7 cm6 Jul 2011Q.M.C.126852
2.5 cm6 Jul 2011Q.M.C.126852

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
Bobbers Mill7 Jul 20267 Jul 20261
Q.M.C.7 Jun 199529 Jul 20224

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

1995–2026

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 13 measured fish were spread across different length ranges.

Smallest
1.8 cm
Lower quarter
2.5 cm
Median
3.1 cm
Upper quarter
6.2 cm
Largest
6.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Leen

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

Stone loach Bullhead Brown / sea trout Chub Gudgeon Minnow

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 →