RiverFish

Roach · Rutilus rutilus

Roach in the River Monkey island

Largest measured roach: 15.3 cm

The largest roach measured in Environment Agency surveys of the River Monkey island was 15.3 cm, recorded at Monkey Island Upstream Fry on 18 August 2015.

Across 881 measured roach, the median measured length was 4 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 Monkey island.

See roach records across England →

Most recent observation30 August 2023Monkey Island Upstream Fry · 1 fish
Largest measured roach
15.3 cm
Median length
4 cm
Fish measured
881
Survey locations
2

Individual EA measurements

Largest measured roach

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

LengthSurvey dateSurvey locationSurvey ID
15.3 cm18 Aug 2015Monkey Island Upstream Fry146040
14.8 cm20 Aug 2018Monkey Island Upstream Fry153438
14.5 cm18 Aug 2015Monkey Island Downstream Fry146041
14.4 cm22 Aug 2017Monkey Island Downstream Fry151488
14.2 cm22 Aug 2017Monkey Island Downstream Fry151488
13.9 cm19 Aug 2008Monkey Island Downstream Fry125624
13.5 cm18 Aug 2015Monkey Island Downstream Fry146041
13.5 cm20 Sept 2005Monkey Island Downstream Fry111809
13.4 cm20 Aug 2012Monkey Island Upstream Fry135293
13.2 cm20 Aug 2018Monkey Island Downstream Fry153439

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

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
Monkey Island Upstream Fry21 Aug 200330 Aug 202315
Monkey Island Downstream Fry21 Aug 200320 Aug 201812

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

2003–2023

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 881 measured fish were spread across different length ranges.

Smallest
1 cm
Lower quarter
3.6 cm
Median
4 cm
Upper quarter
4.3 cm
Largest
15.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Monkey island

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

Perch Chub Dace Gudgeon Minnow Bleak

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 →