RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Itchen

Largest measured 3-spined stickleback: 2.9 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Itchen was 2.9 cm, recorded at Twyford Lodge on 18 October 2011.

Across 3 measured 3-spined stickleback, the median measured length was 2.5 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 Itchen.

See 3-spined stickleback records across England →

Most recent observation5 September 2025St Cross Mill "eel trap run" · 1 fish
Largest measured 3-spined stickleback
2.9 cm
Median length
2.5 cm
Fish measured
3
Survey locations
16

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
2.9 cm18 Oct 2011Twyford Lodge128596
2.5 cm16 Aug 2011Shawford Park127447
2.4 cm16 Aug 2011Shawford Park127447

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
St Cross Mill "eel trap run"5 Sept 20255 Sept 20251
Bishopstoke Barge31 Aug 201029 Aug 20253
Shawford Park1 Sept 201028 Aug 20259
Fulling Mill, Abbott's Worthy12 Aug 200921 Aug 20257
Abbots Worthy, u/s Mill16 Oct 201819 Oct 20242
St Cross Mill7 Sept 20237 Sept 20231
Brambridge11 Sept 20181 Sept 20222
Abbots Worthy, Rochienne's d/s offtake24 Oct 201824 Oct 20181
Abbots Worthy, d/s M316 Oct 201816 Oct 20181
Shipley Bridge, Otterbourne11 Sept 201811 Sept 20181
Wolvesey Lodge12 Sept 201312 Sept 20131
Twyford Lodge18 Oct 201118 Oct 20111
Abbott's Barton, duck's nest spinney27 Sept 201027 Sept 20101
Abbott's Barton Upper27 Sept 201027 Sept 20101
Segar's Farm28 Oct 200928 Oct 20091
Railway25 Sept 200225 Sept 20021

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

2002–2025

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 3 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
2.5 cm
Median
2.5 cm
Upper quarter
2.7 cm
Largest
2.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Itchen

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

Brown / sea trout Bullhead Minnow European eel Atlantic salmon Grayling

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 →