RiverFish

Grayling · Thymallus thymallus

Grayling in the River Hull eel surveys

Largest measured grayling: 36.4 cm

The largest grayling measured in Environment Agency surveys of the River Hull eel surveys was 36.4 cm, recorded at West beck at Bell Mills on 28 September 2011.

Across 28 measured grayling, the median measured length was 26.2 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 Hull eel surveys.

See grayling records across England →

Most recent observation4 June 2025Watton beck at Bridge House Farm · 3 fish
Largest measured grayling
36.4 cm
Median length
26.2 cm
Fish measured
28
Survey locations
4

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
36.4 cm28 Sept 2011West beck at Bell Mills128872
33.4 cm28 Sept 2011West beck at Bell Mills128872
32.4 cm28 Sept 2011West beck at Bell Mills128872
31.5 cm4 Jun 2025Watton beck at Bridge House Farm176770
30.8 cm28 Sept 2011West beck at Bell Mills128872
30.4 cm28 Sept 2011West beck at Bell Mills128872
30.1 cm28 Sept 2011West beck at Bell Mills128872
29.3 cm28 Sept 2011West beck at Bell Mills128872
29.2 cm28 Sept 2011West beck at Bell Mills128872
29.1 cm28 Sept 2011West beck at Bell Mills128872

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
Watton beck at Bridge House Farm5 Jun 20154 Jun 20253
Arram beck12 Jun 201713 Jul 20212
Skerne Beck Upstream confluence with West Beck5 Jun 20155 Jun 20151
West beck at Bell Mills28 Sept 201128 Sept 20111

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

2011–2025

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 28 measured fish were spread across different length ranges.

Smallest
4.7 cm
Lower quarter
8.5 cm
Median
26.3 cm
Upper quarter
29.5 cm
Largest
36.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Hull eel surveys

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

Roach 3-spined stickleback European eel Pike Stone loach Perch

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 →