RiverFish

Zander · Sander lucioperca

Zander in the River Thames

Largest measured zander: 47.8 cm

The largest zander measured in Environment Agency surveys of the River Thames was 47.8 cm, recorded at Days weirpool on 19 July 2015.

Across 7 measured zander, the median measured length was 17.1 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 Thames.

See zander records across England →

Most recent observation9 July 2025Iffley - Sandford (Margin) · 1 fish
Largest measured zander
47.8 cm
Median length
17.1 cm
Fish measured
7
Survey locations
6

Individual EA measurements

Largest measured zander

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

LengthSurvey dateSurvey locationSurvey ID
47.8 cm19 Jul 2015Days weirpool145715
46.4 cm3 Jul 2016Sandford - Abingdon - (Margin)148529
17.8 cm9 Jul 2025Iffley - Sandford (Margin)178483
17.1 cm9 Jul 2024Iffley - Sandford (Margin)165892
16.6 cm3 Jul 2014Culham Weirpool142125
14.7 cm3 Jul 2016Sandford - Abingdon - (Margin)148529
9.8 cm27 Jul 2022Hambleden - Hurley (margin)162071

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

Explore the river

Where zander were found

Each point marks a survey location with at least one zander 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 zander
Iffley - Sandford (Margin)9 Jul 20249 Jul 20252
Sandford Weir stream10 Jul 202410 Jul 20241
Hambleden - Hurley (margin)27 Jul 202227 Jul 20221
Sandford - Abingdon - (Margin)3 Jul 20163 Jul 20161
Days weirpool19 Jul 201519 Jul 20151
Culham Weirpool3 Jul 20143 Jul 20141

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

2014–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 7 measured fish were spread across different length ranges.

Smallest
9.8 cm
Lower quarter
15.7 cm
Median
17.1 cm
Upper quarter
32.1 cm
Largest
47.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thames

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

Roach Bleak Pike Chub Perch 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 →