RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Blackwater (Reepham)

Largest measured 3-spined stickleback: 6.2 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Blackwater (Reepham) was 6.2 cm, recorded at Downstream Blackwater Bridge on 18 June 1997.

Across 15 measured 3-spined stickleback, the median measured length was 4.2 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 Blackwater (Reepham).

See 3-spined stickleback records across England →

Most recent observation17 June 2015Downstream Eades Mill · 3 fish
Largest measured 3-spined stickleback
6.2 cm
Median length
4.2 cm
Fish measured
15
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
6.2 cm18 Jun 1997Downstream Blackwater Bridge17144
5.6 cm17 Jun 2015Downstream Eades Mill145382
5 cm11 May 1994Downstream Blackwater Bridge17142
4.8 cm17 Jun 2015Downstream Eades Mill145382
4.6 cm12 May 1994Downstream Eades Mill17141
4.6 cm5 Apr 1990Downstream Blackwater Bridge17140
4.2 cm17 Jun 2015Downstream Eades Mill145382
4.2 cm24 Apr 2003Downstream Eades Mill75939
4.2 cm5 Apr 1990Downstream Blackwater Bridge17140
4.1 cm5 Apr 1990Downstream Blackwater Bridge17140

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
Downstream Eades Mill4 Apr 199017 Jun 20154
Downstream Blackwater Bridge5 Apr 199018 Jun 19973

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

1990–2015

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 15 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
3.9 cm
Median
4.2 cm
Upper quarter
4.7 cm
Largest
6.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Blackwater (Reepham)

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

Brown / sea trout Bullhead Stone loach Chub Minnow Gudgeon

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 →