RiverFish

Barbel · Barbus barbus

Barbel in the River Old Windsor

Largest measured barbel: 6.7 cm

The largest barbel measured in Environment Agency surveys of the River Old Windsor was 6.7 cm, recorded at Old Windsor Upstream Fry on 18 August 2010.

Across 58 measured barbel, the median measured length was 4.5 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 Old Windsor.

See barbel records across England →

Most recent observation3 September 2025Old Windsor Downstream Fry · 4 fish
Largest measured barbel
6.7 cm
Median length
4.5 cm
Fish measured
58
Survey locations
2

Individual EA measurements

Largest measured barbel

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

LengthSurvey dateSurvey locationSurvey ID
6.7 cm18 Aug 2010Old Windsor Upstream Fry124551
6.6 cm23 Aug 2017Old Windsor Downstream Fry151495
6.3 cm20 Aug 2014Old Windsor Downstream Fry142456
5.9 cm20 Sept 2006Old Windsor Upstream Fry111943
5.8 cm3 Sept 2025Old Windsor Downstream Fry178526
5.8 cm29 Aug 2013Old Windsor Downstream Fry138584
5.6 cm20 Aug 2014Old Windsor Downstream Fry142456
5.5 cm20 Aug 2014Old Windsor Downstream Fry142456
5.4 cm3 Sept 2025Old Windsor Downstream Fry178526
5.4 cm23 Aug 2017Old Windsor Upstream Fry151496

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

Explore the river

Where barbel were found

Each point marks a survey location with at least one barbel 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 barbel
Old Windsor Downstream Fry9 Sept 20043 Sept 20258
Old Windsor Upstream Fry20 Sept 200631 Aug 20236

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

2004–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 58 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
3.8 cm
Median
4.5 cm
Upper quarter
5.2 cm
Largest
6.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Old Windsor

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

Dace Gudgeon Chub Roach Minnow Bleak

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 →