3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Menalhyl

Largest measured 3-spined stickleback: 6.1 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Menalhyl was 6.1 cm, recorded at Tolcarne on 20 June 2018.

Across 7 measured 3-spined stickleback, the median measured length was 4.7 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 Menalhyl.

See 3-spined stickleback records across England →

Most recent observation20 June 2018Tolcarne · 4 fish

Largest measured 3-spined stickleback: 6.1 cm
Median length: 4.7 cm
Fish measured: 7
Survey locations: 4

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.

Length	Survey date	Survey location	Survey ID
6.1 cm	20 Jun 2018	Tolcarne	152985
5.4 cm	20 Jun 2018	Tolcarne	152985
4.9 cm	20 Jun 2018	Tolcarne	152985
4.7 cm	23 May 2012	Tolcarne	131284
4.6 cm	23 May 2012	Tolcarne	131284
4.5 cm	20 Jun 2018	Tolcarne	152985
4.4 cm	23 May 2012	Tolcarne	131284

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 surveyed	First recorded	Last recorded	Visits finding 3-spined stickleback
Tolcarne	13 Jun 2006	20 Jun 2018	3
St. Mawgan-in-Pydar	12 Jun 1986	12 Jun 1986	1
Gluvian	12 Jun 1986	12 Jun 1986	1
Mawgan Porth	4 Jun 1986	4 Jun 1986	1

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

1986–2018

Survey records by year

Each bar shows how many survey visits recorded 3-spined stickleback that year.

386

087

088

089

090

091

092

093

094

095

096

097

098

099

000

001

002

003

004

005

106

007

008

009

010

011

112

013

014

015

016

017

118

Fish measured by surveyors

Measured length distribution

See how the 7 measured fish were spread across different length ranges.

Smallest: 4.4 cm
Lower quarter: 4.6 cm
Median: 4.7 cm
Upper quarter: 5.2 cm
Largest: 6.1 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Menalhyl

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

Brown / sea trout European eel Flounder Minnow Brook lamprey

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 →