RiverFish

Grayling · Thymallus thymallus

Grayling in the Costa Beck

Largest measured grayling: 42.8 cm

The largest grayling measured in Environment Agency surveys of the Costa Beck was 42.8 cm, recorded at Costa Beck Upstream Pickering Beck DERBT107 on 2 September 2009.

Across 150 measured grayling, the median measured length was 19.7 cm.

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

See grayling records across England →

Most recent observation30 August 2023Costa Beck Upstream Pickering Beck DERBT107 · 3 fish
Largest measured grayling
42.8 cm
Median length
19.7 cm
Fish measured
150
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
42.8 cm2 Sept 2009Costa Beck Upstream Pickering Beck DERBT107119845
35.6 cm25 Sept 1997Costa Beck Upstream Pickering Beck DERBT107109965
35.2 cm25 Sept 1997Costa Beck d/s Pickering Beck109969
35.1 cm4 Oct 2000Costa Beck d/s Pickering Beck109977
34.4 cm14 Sept 2005Costa Beck Upstream Pickering Beck DERBT10787972
34.4 cm4 Oct 2000Costa Beck d/s Pickering Beck109977
33.8 cm25 Sept 1997Costa Beck Upstream Pickering Beck DERBT107109965
33.7 cm25 Sept 1997Costa Beck d/s Pickering Beck109969
33.6 cm18 Sept 2001Costa Beck Upstream Pickering Beck DERBT10725570
33.6 cm25 Sept 1997Costa Beck Upstream Pickering Beck DERBT107109965

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
Costa Beck Upstream Pickering Beck DERBT10723 Mar 199530 Aug 202313
Costa beck at Sleightholme Fm20 Sept 201220 Sept 20121
Oxfolds beck22 Jun 200622 Jun 20061
Costa beck at High Costa mill22 Jun 200622 Jun 20061
Costa Beck d/s Pickering Beck23 Mar 19954 Oct 20003

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

1995–2023

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 150 measured fish were spread across different length ranges.

Smallest
7.8 cm
Lower quarter
10.7 cm
Median
19.7 cm
Upper quarter
26.9 cm
Largest
42.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Costa Beck

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

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

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 →