RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Marlow

Largest measured ruffe: 9.7 cm

The largest ruffe measured in Environment Agency surveys of the River Marlow was 9.7 cm, recorded at Marlow Upstream Fry on 18 August 2009.

Across 49 measured ruffe, the median measured length was 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 River Marlow.

See ruffe records across England →

Most recent observation22 August 2016Marlow Downstream Fry · 2 fish
Largest measured ruffe
9.7 cm
Median length
5 cm
Fish measured
49
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
9.7 cm18 Aug 2009Marlow Upstream Fry120421
9.4 cm18 Aug 2009Marlow Upstream Fry120421
9.2 cm21 Aug 2006Marlow Upstream Fry111827
8.6 cm18 Aug 2009Marlow Upstream Fry120421
6.5 cm21 Aug 2006Marlow Downstream Fry111826
6.3 cm18 Aug 2009Marlow Upstream Fry120421
6.1 cm18 Aug 2009Marlow Upstream Fry120421
6 cm30 Aug 2005Marlow Upstream Fry111660
5.8 cm29 Aug 2013Marlow Downstream Fry138580
5.8 cm18 Aug 2009Marlow Upstream Fry120421

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
Marlow Downstream Fry21 Aug 200622 Aug 20166
Marlow Upstream Fry30 Aug 200518 Aug 20094

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

2005–2016

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 49 measured fish were spread across different length ranges.

Smallest
3.2 cm
Lower quarter
4.4 cm
Median
5 cm
Upper quarter
5.6 cm
Largest
9.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Marlow

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

Minnow Gudgeon Chub Roach 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 →