Roach · Rutilus rutilus

Roach in the River Exminster Marsh

Largest measured roach: 21.3 cm

The largest roach measured in Environment Agency surveys of the River Exminster Marsh was 21.3 cm, recorded at Main Ditch at Downstream Motorway (CFse)* on 24 September 1996.

Across 160 measured roach, the median measured length was 9.4 cm.

Surveyors recorded weights for 60 roach. The median was 0.9 oz (0.026 kg) and the largest recorded weight was 5.6 oz (0.159 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 Exminster Marsh.

See roach records across England →

Most recent observation25 September 1996Main Ditch at Turf (CFse)* · 13 fish

Largest measured roach: 21.3 cm
Median length: 9.4 cm
Fish measured: 160
Survey locations: 4

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
21.3 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
20.3 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
19.3 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
18.7 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
18 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
17 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
16.5 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
16.5 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919
16.3 cm	25 Sept 1996	Main Ditch at Turf (CFse)*	73928
15.5 cm	24 Sept 1996	Main Ditch at Downstream Motorway (CFse)*	73919

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
Main Ditch at Turf (CFse)*	25 Sept 1996	25 Sept 1996	1
Black Gulf Dyke - Turf (CFse)*	25 Sept 1996	25 Sept 1996	1
Main Ditch at Lime Kilns (CFse)*	24 Sept 1996	24 Sept 1996	1
Main Ditch at Downstream Motorway (CFse)*	24 Sept 1996	24 Sept 1996	1

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

1996–1996

Survey records by year

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

496

Fish measured by surveyors

Measured length distribution

See how the 160 measured fish were spread across different length ranges.

Smallest: 1 cm
Lower quarter: 4.9 cm
Median: 9.5 cm
Upper quarter: 12.5 cm
Largest: 21.3 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 60 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 0.5 oz (0.013 kg)
Median: 0.9 oz (0.026 kg)
Upper quarter: 1.7 oz (0.0468 kg)
Heaviest: 5.6 oz (0.159 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 Exminster Marsh

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

Perch Pike 3-spined stickleback

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 →