RiverFish

Tench · Tinca tinca

Tench in the River Cookham - Boulters

Largest measured tench: 45 cm

The largest tench measured in Environment Agency surveys of the River Cookham - Boulters was 45 cm, recorded at Odney Weir Stream, Cookham. on 2 September 2013.

Across 15 measured tench, the median measured length was 25.5 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 Cookham - Boulters.

See tench records across England →

Most recent observation27 July 2025Cliveden Island · 1 fish
Largest measured tench
45 cm
Median length
25.5 cm
Fish measured
15
Survey locations
2

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
45 cm2 Sept 2013Odney Weir Stream, Cookham.138867
42.6 cm5 Sept 2011Odney Weir Stream, Cookham.128097
30.5 cm1 Sept 2005Odney Weir Stream, Cookham.86266
29.1 cm1 Sept 2005Odney Weir Stream, Cookham.86266
28.5 cm1 Sept 2005Cliveden Island86178
28.4 cm4 Sept 2017Cliveden Island151478
25.7 cm7 Sept 2004Cliveden Island82508
25.5 cm5 Sept 2011Cliveden Island128096
21.4 cm12 Sept 2019Cliveden Island155742
21 cm2 Sept 2003Odney Weir Stream, Cookham.76963

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
Cliveden Island1 Sept 199827 Jul 20259
Odney Weir Stream, Cookham.2 Sept 20032 Sept 20134

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

1998–2025

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 15 measured fish were spread across different length ranges.

Smallest
9.6 cm
Lower quarter
17.4 cm
Median
25.5 cm
Upper quarter
28.8 cm
Largest
45 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cookham - Boulters

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

Bleak Roach Perch Pike European eel 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 →