RiverFish

Tench · Tinca tinca

Tench in the Swavesey Drain

Largest measured tench: 23 cm

The largest tench measured in Environment Agency surveys of the Swavesey Drain was 23 cm, recorded at DS Webs Hole Sluice on 18 April 2005.

Across 5 measured tench, the median measured length was 18.3 cm.

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

See tench records across England →

Most recent observation20 May 2026US Webs Hole Sluice · 1 fish
Largest measured tench
23 cm
Median length
18.3 cm
Fish measured
5
Survey locations
3

Individual EA measurements

Largest measured tench

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

LengthSurvey dateSurvey locationSurvey ID
23 cm18 Apr 2005DS Webs Hole Sluice84408
20.3 cm2 May 2013US Webs Hole Sluice135942
18.3 cm20 May 2026US Webs Hole Sluice181635
10 cm18 Apr 2005DS Webs Hole Sluice84408
7.4 cm2 May 2013US Webs Hole Sluice135942

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

Explore the river

Where tench were found

Each point marks a survey location with at least one tench 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 tench
US Webs Hole Sluice18 Apr 200520 May 20263
Swavesey Drain (Eel Monitoring)2 May 20132 May 20131
DS Webs Hole Sluice18 Apr 200518 Apr 20051

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

2005–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 5 measured fish were spread across different length ranges.

Smallest
7.4 cm
Lower quarter
10 cm
Median
18.3 cm
Upper quarter
20.3 cm
Largest
23 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Swavesey Drain

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

Dace Perch Roach Common bream European eel

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 →