Stone loach · Barbatula barbatula

Stone loach in the River Morden Hall

Largest measured stone loach: 13 cm

The largest stone loach measured in Environment Agency surveys of the River Morden Hall was 13 cm, recorded at Morden Hall Park on 16 April 2002.

Across 254 measured stone loach, the median measured length was 7.2 cm.

Surveyors recorded one individual weight: 0.1 oz (0.003 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Morden Hall.

See stone loach records across England →

Most recent observation1 October 2025Morden Hall Park · 86 fish

Largest measured stone loach: 13 cm
Median length: 7.2 cm
Fish measured: 254
Survey locations: 3

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.

Length	Survey date	Survey location	Survey ID
13 cm	16 Apr 2002	Morden Hall Park	73753
12.5 cm	24 Jun 2015	Morden Hall Park	145179
12.5 cm	24 Jun 2015	Morden Hall Park	145179
12.5 cm	16 Apr 2002	Morden Hall Park	73753
12.5 cm	16 Apr 2002	Morden Hall Park	73753
12.4 cm	24 Jun 2015	Morden Hall Park	145179
12.1 cm	16 Apr 2002	Morden Hall Park	73753
12 cm	7 May 2003	Morden Hall Park	76625
12 cm	16 Apr 2002	Morden Hall Park	73753
12 cm	16 Apr 2002	Morden Hall Park	73753

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 surveyed	First recorded	Last recorded	Visits finding stone loach
Morden Hall Park	29 Mar 1994	1 Oct 2025	11
Phipps Bridge to Morden Hall Deer Park	26 Jul 1988	26 Jul 1988	1
Morden Hall Deer Park	26 Jul 1988	26 Jul 1988	1

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

1988–2025

Survey records by year

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

288

089

090

091

092

093

194

095

096

197

098

099

000

001

102

103

104

005

006

007

008

109

010

111

012

113

014

115

016

117

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 254 measured fish were spread across different length ranges.

Smallest: 3.5 cm
Lower quarter: 5.8 cm
Median: 7.2 cm
Upper quarter: 10 cm
Largest: 13 cm

0–99 mm

190

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 0.1 oz (0.003 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Morden Hall

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

Gudgeon Chub European eel Roach Dace 3-spined stickleback

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 →