Chub · Leuciscus cephalus

Chub in the River Colnebrook

Largest measured chub: 52.9 cm

The largest chub measured in Environment Agency surveys of the River Colnebrook was 52.9 cm, recorded at Hythe End on 12 June 2013.

Across 213 measured chub, the median measured length was 22.1 cm.

Surveyors recorded weights for 55 chub. The median was 3.4 oz (0.095 kg) and the largest recorded weight was 2 lb 4.7 oz (1.04 kg).

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

See chub records across England →

Most recent observation2 June 2026Wraysbury · 7 fish

Largest measured chub: 52.9 cm
Median length: 22.1 cm
Fish measured: 213
Survey locations: 6

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
52.9 cm	12 Jun 2013	Hythe End	136373
52 cm	2 Jun 2026	Wraysbury	182113
52 cm	3 Jun 2010	Hythe End	121759
51.3 cm	2 Jun 2009	Hythe End	117315
50.7 cm	1 Jun 2017	Wraysbury	150472
50.2 cm	14 Jun 2018	Wraysbury	152733
50 cm	24 Apr 2010	Horton Upstream Site	121427
49.4 cm	12 Jun 2007	Hythe End	105550
48.8 cm	12 Jun 2008	Hythe End	111357
48.8 cm	12 Jun 2008	Hythe End	111357

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
Wraysbury	3 Jun 2015	2 Jun 2026	8
Thorney Golf Course	13 May 1986	20 Jun 2023	12
Hythe End	20 Nov 2001	6 Jun 2014	13
Horton Upstream Site	24 Apr 2010	24 Apr 2010	1
Horton Downstream site	23 Apr 2010	23 Apr 2010	1
Iver	15 May 1986	15 May 1986	1

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

1986–2026

Survey records by year

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

286

087

088

089

090

091

092

093

094

095

096

097

098

099

000

201

202

203

204

105

106

207

208

109

410

111

212

113

114

215

016

117

118

119

020

021

022

223

124

125

126

Fish measured by surveyors

Measured length distribution

See how the 213 measured fish were spread across different length ranges.

Smallest: 1.5 cm
Lower quarter: 12 cm
Median: 22.1 cm
Upper quarter: 36.6 cm
Largest: 52.9 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

500–599 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 55 chub. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.003 kg)
Lower quarter: 0.6 oz (0.018 kg)
Median: 3.4 oz (0.095 kg)
Upper quarter: 9.8 oz (0.2765 kg)
Heaviest: 2 lb 4.7 oz (1.04 kg)

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

More fish in this river

Explore the River Colnebrook

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

European eel Perch Roach Pike Gudgeon Minnow

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 →