Roach · Rutilus rutilus

Roach in the Kings Dyke

Largest measured roach: 30.8 cm

The largest roach measured in Environment Agency surveys of the Kings Dyke was 30.8 cm, recorded at Ashline Lock on 18 June 1991.

Across 13,242 measured roach, the median measured length was 9.8 cm.

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

See roach records across England →

Most recent observation28 October 2025Horsey Toll · 16 fish

Largest measured roach: 30.8 cm
Median length: 9.8 cm
Fish measured: 13,242
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
30.8 cm	18 Jun 1991	Ashline Lock	29579
29.3 cm	14 May 1999	Fields End Bridge	29585
28.3 cm	21 May 1999	Horsey Toll	29584
27.8 cm	21 May 1999	Horsey Toll	29584
27.8 cm	11 May 1987	Horsey Toll	29568
27.3 cm	21 May 1999	Horsey Toll	29584
27.3 cm	21 Jun 1994	Fields End Bridge	29581
26.8 cm	21 May 1999	Horsey Toll	29584
26.8 cm	21 Jun 1994	Fields End Bridge	29581
26.3 cm	21 May 1999	Horsey Toll	29584

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
Horsey Toll	11 May 1987	28 Oct 2025	7
Whittlesey	13 May 1987	14 Oct 2025	10
Fields End Bridge	15 May 1987	14 May 1999	5
Ashline Lock	14 May 1987	22 Jun 1994	4

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

1987–2025

Survey records by year

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

487

088

089

490

491

092

093

494

095

096

097

098

399

000

001

002

003

004

005

206

007

008

009

010

111

012

013

014

015

016

117

018

019

020

021

022

123

024

225

Fish measured by surveyors

Measured length distribution

See how the 13,242 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 7.8 cm
Median: 9.8 cm
Upper quarter: 11.8 cm
Largest: 30.8 cm

0–99 mm

7219

100–199 mm

5867

200–299 mm

155

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Kings Dyke

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

Perch Pike Common bream Silver bream Bleak Ruffe

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 →