Chub · Leuciscus cephalus

Chub in the Grand Union Canal

Largest measured chub: 46.5 cm

The largest chub measured in Environment Agency surveys of the Grand Union Canal was 46.5 cm, recorded at Hunton Bridge on 21 April 1988.

Across 41 measured chub, the median measured length was 29.6 cm.

Surveyors recorded weights for 33 chub. The median was 14.8 oz (0.42 kg) and the largest recorded weight was 3 lb 7.8 oz (1.58 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 chub records across England →

Most recent observation16 September 2013Springwell Backwater · 7 fish

Largest measured chub: 46.5 cm
Median length: 29.6 cm
Fish measured: 41
Survey locations: 5

Individual EA measurements

Largest measured chub

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
46.5 cm	21 Apr 1988	Hunton Bridge	116477
45 cm	21 Apr 1988	Hunton Bridge	116477
44.4 cm	21 Apr 1988	Hunton Bridge	116477
43.6 cm	9 Mar 1988	Cassiobury Park u/s Lock	116407
42.5 cm	21 Apr 1988	Hunton Bridge	116477
41.3 cm	8 Mar 1988	Stockers Farm	116413
40.5 cm	8 Mar 1988	Stockers Farm	116413
38.7 cm	18 Mar 1988	Coppermill Lane, Rickmansworth	116490
37.6 cm	9 Mar 1988	Cassiobury Park u/s Lock	116407
36.4 cm	8 Mar 1988	Stockers Farm	116413

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

Explore the river

Where chub were found

Each point marks a survey location with at least one chub 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 chub
Springwell Backwater	16 Sept 2013	16 Sept 2013	1
Hunton Bridge	21 Apr 1988	21 Apr 1988	1
Coppermill Lane, Rickmansworth	18 Mar 1988	18 Mar 1988	1
Cassiobury Park u/s Lock	9 Mar 1988	9 Mar 1988	1
Stockers Farm	8 Mar 1988	8 Mar 1988	1

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

1988–2013

Survey records by year

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

488

089

090

091

092

093

094

095

096

097

098

099

000

001

002

003

004

005

006

007

008

009

010

011

012

113

Fish measured by surveyors

Measured length distribution

See how the 41 measured fish were spread across different length ranges.

Smallest: 1.8 cm
Lower quarter: 8.6 cm
Median: 29.6 cm
Upper quarter: 36 cm
Largest: 46.5 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 33 chub. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 3 oz (0.086 kg)
Median: 14.8 oz (0.42 kg)
Upper quarter: 1 lb 12.1 oz (0.796 kg)
Heaviest: 3 lb 7.8 oz (1.58 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 →