RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Nidd

Largest measured 3-spined stickleback: 4.5 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Nidd was 4.5 cm, recorded at Knaresborough Bypass on 22 June 2016.

Across 25 measured 3-spined stickleback, the median measured length was 3.7 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 Nidd.

See 3-spined stickleback records across England →

Most recent observation9 July 2025Knaresborough Bypass
Largest measured 3-spined stickleback
4.5 cm
Median length
3.7 cm
Fish measured
25
Survey locations
7

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
4.5 cm22 Jun 2016Knaresborough Bypass148273
4.5 cm19 Sept 2000Kirk Hammerton - Fry Survey130784
4.4 cm2 Jul 2019Knaresborough Bypass154812
4.4 cm14 Sept 2004Kirk Hammerton - Fry Survey130787
4.3 cm2 Jul 2019Knaresborough Bypass154812
4.3 cm19 Sept 2000Kirk Hammerton - Fry Survey130784
4.2 cm2 Jul 2019Knaresborough Bypass154812
4.2 cm19 Sept 2000Kirk Hammerton - Fry Survey130784
4.1 cm14 Sept 2004Kirk Hammerton - Fry Survey130787
4 cm14 Sept 2004Kirk Hammerton - Fry Survey130787

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
Knaresborough Bypass5 Jul 20119 Jul 20258
Ribston Park (NEW 2018)30 Jun 20228 Jul 20252
Ribston Park19 Jun 20133 Jul 20192
Summerbridge8 Sept 20158 Sept 20151
Cowthorpe10 Jul 201410 Jul 20141
Kirk Hammerton - Fry Survey21 Sept 199910 Sept 20125
Nun Monkton3 Aug 20123 Aug 20121

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

1999–2025

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 25 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
3.1 cm
Median
3.7 cm
Upper quarter
4.2 cm
Largest
4.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nidd

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

Minnow Bullhead Stone loach Grayling Brown / sea trout European eel

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 →