RiverFish

Grayling · Thymallus thymallus

Grayling in the River Ecclesbourne

Largest measured grayling: 29.9 cm

The largest grayling measured in Environment Agency surveys of the River Ecclesbourne was 29.9 cm, recorded at Duffield on 23 August 2010.

Across 161 measured grayling, the median measured length was 12.1 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 Ecclesbourne.

See grayling records across England →

Most recent observation29 September 2025Duffield · 1 fish
Largest measured grayling
29.9 cm
Median length
12.1 cm
Fish measured
161
Survey locations
2

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
29.9 cm23 Aug 2010Duffield123564
29.9 cm2 Jun 2005Duffield84808
29.5 cm8 Feb 1995Duffield24404
29.3 cm29 Aug 2012Duffield133897
28.4 cm8 Feb 1995Duffield24404
28 cm29 Aug 2012Duffield133897
28 cm8 Feb 1995Duffield24404
27.6 cm11 Jan 2000Duffield23384
27.6 cm8 Feb 1995Duffield24404
26.8 cm8 Feb 1995Duffield24404

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
Duffield8 Feb 199529 Sept 202510
Windley Meadows9 Sept 20249 Sept 20241

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

1995–2025

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 161 measured fish were spread across different length ranges.

Smallest
5.5 cm
Lower quarter
9.4 cm
Median
12.1 cm
Upper quarter
19.7 cm
Largest
29.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ecclesbourne

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

Brown / sea trout Bullhead Stone loach Minnow 3-spined stickleback Brook lamprey

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 →