RiverFish

Grayling · Thymallus thymallus

Grayling in the Bentley Brook

Largest measured grayling: 40 cm

The largest grayling measured in Environment Agency surveys of the Bentley Brook was 40 cm, recorded at Downstream Ashbourne Stw on 18 October 2006.

Across 88 measured grayling, the median measured length was 21.5 cm.

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

See grayling records across England →

Most recent observation25 August 2015Woodside · 10 fish
Largest measured grayling
40 cm
Median length
21.5 cm
Fish measured
88
Survey locations
5

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
40 cm18 Oct 2006Downstream Ashbourne Stw102153
38.5 cm18 Oct 2006Upstream Ashbourne Stw102013
36 cm18 Oct 2006Downstream Ashbourne Stw102153
35.9 cm25 Aug 2015Downstream Horsley Farm146977
34.9 cm18 Oct 2006Downstream Ashbourne Stw102153
32.8 cm8 Jul 1997Downstream Ashbourne Stw5208
32.3 cm25 Aug 2015Woodside146979
31.7 cm18 Oct 2006Downstream Ashbourne Stw102153
31.7 cm18 Oct 2006Upstream Ashbourne Stw102013
31.4 cm8 Jul 1997Downstream Ashbourne Stw5208

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
Woodside25 Aug 201525 Aug 20151
Downstream Horsley Farm25 Aug 201525 Aug 20151
Mapleton Bridge22 Aug 201322 Aug 20131
Upstream Ashbourne Stw8 Jul 199718 Oct 20062
Downstream Ashbourne Stw8 Jul 199718 Oct 20062

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

1997–2015

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 88 measured fish were spread across different length ranges.

Smallest
6.9 cm
Lower quarter
12.4 cm
Median
21.5 cm
Upper quarter
26.2 cm
Largest
40 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bentley Brook

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

Brown / sea trout Bullhead

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 →