RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Marlow

Largest measured stone loach: 9.8 cm

The largest stone loach measured in Environment Agency surveys of the River Marlow was 9.8 cm, recorded at Marlow Downstream Fry on 21 August 2006.

Across 33 measured stone loach, 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 Marlow.

See stone loach records across England →

Most recent observation4 September 2025Marlow Upstream Fry · 1 fish
Largest measured stone loach
9.8 cm
Median length
4.5 cm
Fish measured
33
Survey locations
2

Individual EA measurements

Largest measured stone loach

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

LengthSurvey dateSurvey locationSurvey ID
9.8 cm21 Aug 2006Marlow Downstream Fry111826
8 cm4 Sept 2025Marlow Upstream Fry178523
8 cm21 Aug 2006Marlow Downstream Fry111826
7.4 cm21 Aug 2006Marlow Downstream Fry111826
6.2 cm21 Aug 2006Marlow Downstream Fry111826
5.9 cm21 Aug 2006Marlow Downstream Fry111826
5.9 cm21 Aug 2006Marlow Downstream Fry111826
5.7 cm21 Aug 2006Marlow Upstream Fry111827
5.7 cm21 Aug 2006Marlow Downstream Fry111826
5.7 cm21 Aug 2006Marlow Downstream Fry111826

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

Explore the river

Where stone loach were found

Each point marks a survey location with at least one stone loach 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 stone loach
Marlow Upstream Fry21 Aug 20064 Sept 20254
Marlow Downstream Fry21 Aug 200622 Aug 20244

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

2006–2025

Survey records by year

Each bar shows how many survey visits recorded stone loach that year.

Fish measured by surveyors

Measured length distribution

See how the 33 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
3.4 cm
Median
4.5 cm
Upper quarter
5.7 cm
Largest
9.8 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 →