RiverFish

Grayling · Thymallus thymallus

Grayling in the River US Lt Ouse

Largest measured grayling: 31.3 cm

The largest grayling measured in Environment Agency surveys of the River US Lt Ouse was 31.3 cm, recorded at Two Mile Bottom on 24 February 1993.

Across 19 measured grayling, the median measured length was 25.3 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 US Lt Ouse.

See grayling records across England →

Most recent observation5 February 1996Santon Downham · 2 fish
Largest measured grayling
31.3 cm
Median length
25.3 cm
Fish measured
19
Survey locations
3

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
31.3 cm24 Feb 1993Two Mile Bottom30163
29.3 cm5 Feb 1996Santon Downham30177
29.3 cm23 Feb 1993Abbey Weir30162
28.8 cm22 Feb 1993Santon Downham30164
28.3 cm22 Feb 1993Santon Downham30164
27.8 cm22 Feb 1993Santon Downham30164
26.3 cm24 Feb 1993Two Mile Bottom30163
26.3 cm22 Feb 1993Santon Downham30164
25.8 cm22 Feb 1993Santon Downham30164
25.3 cm22 Feb 1993Santon Downham30164

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
Santon Downham22 Feb 19935 Feb 19962
Two Mile Bottom24 Feb 199324 Feb 19931
Abbey Weir23 Feb 199323 Feb 19931

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

1993–1996

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 19 measured fish were spread across different length ranges.

Smallest
8.8 cm
Lower quarter
19.3 cm
Median
25.3 cm
Upper quarter
28.1 cm
Largest
31.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River US Lt Ouse

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

Bullhead Pike Dace European eel Gudgeon 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 →