RiverFish

Grayling · Thymallus thymallus

Grayling in the River Allen

Largest measured grayling: 45.8 cm

The largest grayling measured in Environment Agency surveys of the River Allen was 45.8 cm, recorded at Downstream Fitches Bridge on 26 July 2001.

Across 517 measured grayling, the median measured length was 20.3 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 Allen.

See grayling records across England →

Most recent observation29 July 2025Downstream Fitches Bridge · 1 fish
Largest measured grayling
45.8 cm
Median length
20.3 cm
Fish measured
517
Survey locations
6

Individual EA measurements

Largest measured grayling

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
45.8 cm26 Jul 2001Downstream Fitches Bridge106031
45 cm26 Jul 2001Downstream Fitches Bridge106031
44.3 cm3 Oct 2012Downstream Fitches Bridge134066
43.3 cm1 Nov 2004Downstream Fitches Bridge83637
42.2 cm26 Aug 2009Witchampton Mill118885
41.5 cm1 Nov 2004Downstream Fitches Bridge83637
41 cm30 Aug 2016Witchampton Mill149090
40.5 cm25 Aug 2010Witchampton Mill123731
40.5 cm27 Aug 2008Witchampton Mill116350
40.3 cm26 Aug 2022Witchampton Mill161364

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where grayling were found

Each point marks a survey location with at least one grayling 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 surveyedFirst recordedLast recordedVisits finding grayling
Downstream Fitches Bridge26 Jul 200129 Jul 202514
Witchampton Mill28 Oct 20029 Jul 202519
Witchampton New Town28 Aug 201928 Aug 20191
Witchampton Lane Bridge28 Aug 201928 Aug 20191
Upstream Hinton Parva28 Aug 201928 Aug 20191
Downstream Wimborne27 Jul 20012 Aug 20185

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 grayling that year.

Fish measured by surveyors

Measured length distribution

See how the 517 measured fish were spread across different length ranges.

Smallest
5.5 cm
Lower quarter
10.4 cm
Median
20.3 cm
Upper quarter
27.8 cm
Largest
45.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Allen

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

Brown / sea trout European eel Atlantic salmon Dace Pike 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 →