Tench · Tinca tinca

Tench in the Grand Union Canal

Largest measured tench: 72.5 cm

The largest tench measured in Environment Agency surveys of the Grand Union Canal was 72.5 cm, recorded at Victoria Park on 23 March 1988.

Across 70 measured tench, the median measured length was 28.5 cm.

Surveyors recorded weights for 68 tench. The median was 15.2 oz (0.4305 kg) and the largest recorded weight was 2 lb 13.7 oz (1.3 kg).

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

See tench records across England →

Most recent observation26 April 1988Slough Arm at Iver North STW · 10 fish

Largest measured tench: 72.5 cm
Median length: 28.5 cm
Fish measured: 70
Survey locations: 8

Individual EA measurements

Largest measured tench

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
72.5 cm	23 Mar 1988	Victoria Park	116189
42.2 cm	26 Apr 1988	Slough Arm at Iver North STW	116487
38.7 cm	26 Apr 1988	Slough Arm at Iver North STW	116487
38.7 cm	5 Jun 1987	Horsendon Lane	116193
38.2 cm	26 Apr 1988	Slough Arm at Iver North STW	116487
37.9 cm	8 Mar 1988	Stockers Farm	116413
36.8 cm	26 Apr 1988	Slough Arm at Iver North STW	116487
36.7 cm	23 Mar 1988	Victoria Park	116189
36 cm	8 Mar 1988	Stockers Farm	116413
34.5 cm	26 Apr 1988	Slough Arm at Iver North STW	116487

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 surveyed	First recorded	Last recorded	Visits finding tench
Slough Arm at Iver North STW	26 Apr 1988	26 Apr 1988	1
Hunton Bridge	21 Apr 1988	21 Apr 1988	1
Victoria Park	23 Mar 1988	23 Mar 1988	1
Stockers Farm	8 Mar 1988	8 Mar 1988	1
Slough Arm at B470 Road	29 Feb 1988	29 Feb 1988	1
Horsendon Lane	5 Jun 1987	5 Jun 1987	1
Berkhamsted	31 Mar 1987	31 Mar 1987	1
Johnsons Lock	17 Mar 1987	17 Mar 1987	1

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

1987–1988

Survey records by year

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

387

588

Fish measured by surveyors

Measured length distribution

See how the 70 measured fish were spread across different length ranges.

Smallest: 8.4 cm
Lower quarter: 24.1 cm
Median: 28.5 cm
Upper quarter: 31.7 cm
Largest: 72.5 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

700–799 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 68 tench. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.4 oz (0.01 kg)
Lower quarter: 7.9 oz (0.2232 kg)
Median: 15.2 oz (0.4305 kg)
Upper quarter: 1 lb 4.5 oz (0.5815 kg)
Heaviest: 2 lb 13.7 oz (1.3 kg)

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

More fish in this river

Explore the Grand Union Canal

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

Perch Roach Pike Common bream Gudgeon 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 →