RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the Dollis Brook

Largest measured 3-spined stickleback: 4.7 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the Dollis Brook was 4.7 cm, recorded at Dollis Brook Lower on 18 September 2024.

Across 41 measured 3-spined stickleback, the median measured length was 3.8 cm.

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

See 3-spined stickleback records across England →

Most recent observation18 September 2024Dollis Brook Lower · 17 fish
Largest measured 3-spined stickleback
4.7 cm
Median length
3.8 cm
Fish measured
41
Survey locations
6

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
4.7 cm18 Sept 2024Dollis Brook Lower181671
4.5 cm18 Sept 2024Dollis Brook Lower181671
4.5 cm18 Sept 2024Dollis Brook Lower181671
4.4 cm18 Sept 2024Dollis Brook Lower181671
4.4 cm18 Sept 2024Dollis brook upper181660
4.3 cm18 Sept 2024Dollis brook upper181660
4.2 cm18 Sept 2024Dollis Brook Lower181671
4.1 cm18 Sept 2024Dollis brook upper181660
4.1 cm18 Sept 2024Dollis brook upper181660
4 cm18 Sept 2024Dollis Brook Lower181671

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
Dollis brook upper18 Sept 202418 Sept 20241
Dollis Brook Lower18 Sept 202418 Sept 20241
Brookside7 Sept 19947 Sept 19941
Waverly Road30 Aug 199430 Aug 19941
Southover30 Aug 199430 Aug 19941
Brook Farm30 Aug 199430 Aug 19941

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

1994–2024

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 41 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
3.5 cm
Median
3.8 cm
Upper quarter
4 cm
Largest
4.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

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 →