Roach · Rutilus rutilus

Roach in the River Cadnam

Largest measured roach: 22.2 cm

The largest roach measured in Environment Agency surveys of the River Cadnam was 22.2 cm, recorded at Newbridge on 3 September 2018.

Across 210 measured roach, the median measured length was 13.4 cm.

Surveyors recorded weights for 3 roach. The median was 0.2 oz (0.006 kg) and the largest recorded weight was 0.2 oz (0.007 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Cadnam.

See roach records across England →

Most recent observation17 September 2025Newbridge · 5 fish

Largest measured roach: 22.2 cm
Median length: 13.4 cm
Fish measured: 210
Survey locations: 1

Individual EA measurements

Largest measured roach

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
22.2 cm	3 Sept 2018	Newbridge	153659
21.2 cm	3 Sept 2018	Newbridge	153659
19 cm	17 Sept 2025	Newbridge	178968
18.5 cm	3 Sept 2018	Newbridge	153659
18.3 cm	29 Sept 2023	Newbridge	163430
18 cm	29 Sept 2023	Newbridge	163430
18 cm	18 Sept 2008	Newbridge	116150
17.8 cm	29 Sept 2023	Newbridge	163430
17.6 cm	14 May 2013	Newbridge	135989
17.5 cm	17 Sept 2025	Newbridge	178968

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 surveyed	First recorded	Last recorded	Visits finding roach
Newbridge	7 Sept 2001	17 Sept 2025	11

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

2001–2025

Survey records by year

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

101

002

003

004

005

006

007

108

009

010

011

012

113

014

015

016

017

118

119

120

121

122

123

124

125

Fish measured by surveyors

Measured length distribution

See how the 210 measured fish were spread across different length ranges.

Smallest: 4.7 cm
Lower quarter: 12.2 cm
Median: 13.4 cm
Upper quarter: 14.5 cm
Largest: 22.2 cm

0–99 mm

100–199 mm

201

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 3 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 0.1 oz (0.004 kg)
Median: 0.2 oz (0.006 kg)
Upper quarter: 0.2 oz (0.0065 kg)
Heaviest: 0.2 oz (0.007 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Cadnam

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

Bullhead Minnow Stone loach Brook lamprey Brown / sea trout European eel

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 →