Roach · Rutilus rutilus

Roach in the River Thurne (Seine)

Largest measured roach: 25.3 cm

The largest roach measured in Environment Agency surveys of the River Thurne (Seine) was 25.3 cm, recorded at Upstream Martham Ferry on 8 September 1986.

Across 2,134 measured roach, the median measured length was 9.2 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 Thurne (Seine).

See roach records across England →

Most recent observation15 October 1998Upstream Thurne Lion Dyke · 4 fish

Largest measured roach: 25.3 cm
Median length: 9.2 cm
Fish measured: 2,134
Survey locations: 9

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
25.3 cm	8 Sept 1986	Upstream Martham Ferry	16884
25.1 cm	22 Aug 1986	Upstream Thurne Lion Dyke	16890
24 cm	8 Sept 1986	Upstream Martham Ferry	16884
23.8 cm	24 Aug 1986	Downstream Potter Bridge	16887
23.6 cm	16 Jul 1998	Upstream Candle Dyke	16910
23.5 cm	8 Sept 1986	Upstream Martham Ferry	16884
22.6 cm	7 Oct 1993	Upstream Potter Bridge	16905
22.5 cm	8 Sept 1986	Upstream Martham Ferry	16884
22.2 cm	16 Jul 1998	Upstream Candle Dyke	16910
22.2 cm	22 Aug 1986	Upstream Thurne Lion Dyke	16890

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
Upstream Thurne Lion Dyke	22 Aug 1986	15 Oct 1998	2
Downstream Womack Water	18 Aug 1986	15 Oct 1998	2
Downstream Dungeon Corner	15 Sept 1986	21 Aug 1998	2
West Somerton	18 Aug 1998	18 Aug 1998	1
Upstream Potter Bridge	21 Aug 1986	16 Jul 1998	4
Upstream Martham Ferry	8 Sept 1986	16 Jul 1998	3
Upstream Candle Dyke	23 Aug 1986	16 Jul 1998	4
Downstream Repps Staithe	21 Aug 1986	15 Jul 1998	3
Downstream Potter Bridge	24 Aug 1986	24 Aug 1986	1

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

1986–1998

Survey records by year

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

886

087

088

489

090

091

092

293

094

095

096

097

898

Fish measured by surveyors

Measured length distribution

See how the 2,134 measured fish were spread across different length ranges.

Smallest: 1.6 cm
Lower quarter: 7.8 cm
Median: 9.2 cm
Upper quarter: 11.4 cm
Largest: 25.3 cm

0–99 mm

1272

100–199 mm

848

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thurne (Seine)

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

Flounder Perch Common bream Smelt 3-spined stickleback Rudd

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 →