RiverFish

Minnow · Phoxinus phoxinus

Minnow in the River Monnow

Largest measured minnow: 7.4 cm

The largest minnow measured in Environment Agency surveys of the River Monnow was 7.4 cm, recorded at Clodock on 23 August 2013.

Across 20 measured minnow, 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 Monnow.

See minnow records across England →

Most recent observation5 August 2025Clodock
Largest measured minnow
7.4 cm
Median length
4.2 cm
Fish measured
20
Survey locations
7

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
7.4 cm23 Aug 2013Clodock138242
6.5 cm23 Aug 2013Clodock138242
6.2 cm23 Aug 2013Clodock138242
6.1 cm23 Aug 2013Clodock138242
6.1 cm23 Aug 2013Clodock138242
6 cm23 Aug 2013Clodock138242
6 cm23 Aug 2013Clodock138242
5.7 cm23 Aug 2013Clodock138242
4.8 cm23 Aug 2013Clodock138242
4.3 cm23 Aug 2013Clodock138242

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
Clodock11 Jul 19895 Aug 20259
W059J16 Sept 200316 Sept 20031
W059H21 Sept 200016 Sept 20033
W059G21 Sept 200016 Sept 20033
W059F22 Sept 200016 Sept 20033
W098r20 Jul 19978 Sept 19992
W05511 Jul 198922 Aug 19952

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

1989–2025

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 20 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
3.2 cm
Median
4.3 cm
Upper quarter
6 cm
Largest
7.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Monnow

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

Brown / sea trout Bullhead European eel Stone loach 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 →