Roach · Rutilus rutilus

Roach in the River Blackwater

Largest measured roach: 26.5 cm

The largest roach measured in Environment Agency surveys of the River Blackwater was 26.5 cm, recorded at Wade Bridge on 30 August 2006.

Across 283 measured roach, the median measured length was 13.5 cm.

Surveyors recorded weights for 89 roach. The median was 1.8 oz (0.052 kg) and the largest recorded weight was 12 oz (0.34 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 Blackwater.

See roach records across England →

Most recent observation16 September 2025Broadlands Fishery · 4 fish

Largest measured roach: 26.5 cm
Median length: 13.5 cm
Fish measured: 283
Survey locations: 7

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
26.5 cm	30 Aug 2006	Wade Bridge	101586
24 cm	23 Sept 2019	Broadlands Fishery	155457
24 cm	23 Jul 2018	Wade Bridge	153122
23 cm	3 Sept 2018	Broadlands Fishery	153662
22.6 cm	30 Aug 2005	Wade Bridge	86398
22.5 cm	28 Jul 2011	Lower Whinwhistle	127236
22.5 cm	5 Aug 2005	Landford	86383
22.3 cm	30 Aug 2005	Wade Bridge	86398
22.2 cm	30 Aug 2005	Wade Bridge	86398
21.7 cm	2 Sept 2004	Wade Bridge	82064

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
Broadlands Fishery	20 Sept 2011	16 Sept 2025	9
Landford	5 Aug 2005	17 Sept 2024	3
Wade Bridge	16 Sept 2002	23 Jul 2018	6
Lower Bridge Farm	31 Jul 2012	31 Jul 2012	1
Upper Whinwhistle	20 Sept 2011	20 Sept 2011	1
Lower Whinwhistle	28 Jul 2011	28 Jul 2011	1
Hammonds Farm	6 Sept 2004	6 Sept 2004	1

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

2002–2025

Survey records by year

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

102

103

204

205

106

007

008

009

010

311

112

013

014

015

016

017

218

119

120

121

122

223

224

125

Fish measured by surveyors

Measured length distribution

See how the 283 measured fish were spread across different length ranges.

Smallest: 2.4 cm
Lower quarter: 11 cm
Median: 13.5 cm
Upper quarter: 16.6 cm
Largest: 26.5 cm

0–99 mm

100–199 mm

219

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 89 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: 0.8 oz (0.022 kg)
Median: 1.8 oz (0.052 kg)
Upper quarter: 3.2 oz (0.09 kg)
Heaviest: 12 oz (0.34 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 Blackwater

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

Bullhead European eel Dace Brown / sea trout Stone loach Gudgeon

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 →