RiverFish

Minnow · Phoxinus phoxinus

Minnow in the River Main Inny

Largest measured minnow: 8.8 cm

The largest minnow measured in Environment Agency surveys of the River Main Inny was 8.8 cm, recorded at Trewinnow on 24 September 2021.

Across 727 measured minnow, the median measured length was 5.9 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 Main Inny.

See minnow records across England →

Most recent observation21 August 2025U/s Davidstow Creamery Discharge · 60 fish
Largest measured minnow
8.8 cm
Median length
5.9 cm
Fish measured
727
Survey locations
16

Individual EA measurements

Largest measured minnow

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
8.8 cm24 Sept 2021Trewinnow160424
8.8 cm11 Aug 2021U/s Davidstow Creamery Discharge160423
8.6 cm28 Jul 2015Trewinnow145712
8.5 cm28 Aug 2013Bealsmill138202
8.4 cm28 Jul 2015Trewinnow145712
8.4 cm1 Aug 2013St. Clether138038
8.3 cm12 Aug 2025Trewinnow179133
8.3 cm21 Aug 2012St. Clether133465
8.3 cm21 Aug 2012St. Clether133465
8.2 cm11 Aug 2021U/s Davidstow Creamery Discharge160423

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where minnow were found

Each point marks a survey location with at least one minnow 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 minnow
U/s Davidstow Creamery Discharge11 Aug 202121 Aug 20252
St. Clether6 Jul 198413 Aug 202512
Trewinnow10 Jul 200312 Aug 20257
Treguddick Mill13 Jun 201322 Jul 20252
Knightsmill29 Jun 198429 Jun 20235
Trecarrell2 Jul 198422 Sept 20214
Treglasta27 Jul 198415 Sept 20213
Bealsmill26 Jun 198426 Aug 202112
Larrick28 Jul 202128 Jul 20211
Trewen6 Jul 198419 Jul 20215
u/s Laneast Bridge17 Jun 200916 Jul 20213
Treguddick3 Jul 198412 Sept 200710
Inny Foot26 Jun 198430 Jul 19995
Trekenner Mill2 Jul 19843 Sept 19962
Hicks Mill3 Jul 198413 Jul 19932
Killabury6 Jul 19936 Jul 19931

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

1984–2025

Survey records by year

Each bar shows how many survey visits recorded minnow that year.

Fish measured by surveyors

Measured length distribution

See how the 727 measured fish were spread across different length ranges.

Smallest
1.6 cm
Lower quarter
4.4 cm
Median
5.9 cm
Upper quarter
6.6 cm
Largest
8.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Inny

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

Atlantic salmon Brown / sea trout Bullhead Stone loach European eel 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 →