Stone loach · Barbatula barbatula

Stone loach in the River Lee

Largest measured stone loach: 11.4 cm

The largest stone loach measured in Environment Agency surveys of the River Lee was 11.4 cm, recorded at Amwell Loop on 22 September 2004.

Across 354 measured stone loach, the median measured length was 7.2 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 Lee.

See stone loach records across England →

Most recent observation23 July 2026Amwell Loop

Largest measured stone loach: 11.4 cm
Median length: 7.2 cm
Fish measured: 354
Survey locations: 16

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
11.4 cm	22 Sept 2004	Amwell Loop	82419
10.7 cm	22 Sept 2004	Amwell Loop	82419
10.7 cm	15 Mar 1978	Downstream Cecil Saw Mills	116724
10.6 cm	11 Oct 2002	Amwell Loop	72635
10.6 cm	15 Mar 1978	Downstream Cecil Saw Mills	116724
10.5 cm	19 Sept 2003	Amwell Loop	77119
10.4 cm	11 Oct 2002	Amwell Loop	72635
10.4 cm	15 Mar 1978	Downstream Cecil Saw Mills	116724
10.3 cm	28 Aug 2008	Fishers Green	113599
10.3 cm	22 Sept 2004	Amwell Loop	82419

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
Amwell Loop	12 Apr 1978	23 Jul 2026	17
Wheathampstead	17 Sept 2003	9 Jun 2026	16
Hackney Marshes	11 Nov 2003	11 Sept 2025	7
Waterdale	15 Sept 2005	31 Jul 2025	5
Hyde Mill	9 Oct 2002	17 Jun 2025	9
Woolmers Park	1 Nov 2002	3 Aug 2023	8
Fishers Green	14 Nov 2003	27 Jul 2023	12
Stanborough Park	10 Aug 2008	3 Aug 2022	5
Batford	19 Jun 2014	19 Jun 2014	1
Kings Weir Back Loop	14 May 2013	29 May 2014	2
Essendon	26 Aug 2008	26 Jun 2013	2
Hartham Common	13 Jul 2009	13 Jul 2009	1
Waterend	8 Mar 1978	17 Apr 2008	2
Bayford	27 Oct 2006	27 Oct 2006	1
Water Hall Farm	22 Mar 1978	22 Mar 1978	1
Downstream Cecil Saw Mills	15 Mar 1978	15 Mar 1978	1

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

1978–2026

Survey records by year

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

478

079

080

081

082

083

084

085

086

087

088

089

090

091

092

093

094

095

096

097

098

099

000

001

302

503

504

405

406

507

608

509

310

311

212

813

414

215

116

317

118

619

020

021

322

523

124

525

226

Fish measured by surveyors

Measured length distribution

See how the 354 measured fish were spread across different length ranges.

Smallest: 2.5 cm
Lower quarter: 5.6 cm
Median: 7.2 cm
Upper quarter: 8.5 cm
Largest: 11.4 cm

0–99 mm

342

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lee

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

Roach Perch Gudgeon Minnow Chub Pike

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 →