RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Penton Hook - Chertsey

Largest measured ruffe: 11.5 cm

The largest ruffe measured in Environment Agency surveys of the River Penton Hook - Chertsey was 11.5 cm, recorded at Penton Hook, Weir Stream and Pool on 8 September 2003.

Across 7 measured ruffe, the median measured length was 9.2 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 Penton Hook - Chertsey.

See ruffe records across England →

Most recent observation14 September 2009Penton Hook to Chertsey (Laleham Main) · 2 fish
Largest measured ruffe
11.5 cm
Median length
9.2 cm
Fish measured
7
Survey locations
2

Individual EA measurements

Largest measured ruffe

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
11.5 cm8 Sept 2003Penton Hook, Weir Stream and Pool77735
11.1 cm17 Sept 2002Penton Hook to Chertsey (Laleham Main)72121
10.5 cm8 Sept 2003Penton Hook, Weir Stream and Pool77735
9.2 cm17 Sept 2002Penton Hook, Weir Stream and Pool72118
7.6 cm23 Sept 2008Penton Hook to Chertsey (Laleham Main)114669
6.6 cm14 Sept 2009Penton Hook to Chertsey (Laleham Main)119047
5.7 cm14 Sept 2009Penton Hook to Chertsey (Laleham Main)119047

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where ruffe were found

Each point marks a survey location with at least one ruffe 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 ruffe
Penton Hook to Chertsey (Laleham Main)17 Sept 200214 Sept 20093
Penton Hook, Weir Stream and Pool17 Sept 20028 Sept 20032

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

2002–2009

Survey records by year

Each bar shows how many survey visits recorded ruffe that year.

Fish measured by surveyors

Measured length distribution

See how the 7 measured fish were spread across different length ranges.

Smallest
5.7 cm
Lower quarter
7.1 cm
Median
9.2 cm
Upper quarter
10.8 cm
Largest
11.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Penton Hook - Chertsey

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

Roach Chub European eel Gudgeon Bleak Dace

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 →