Bleak · Alburnus alburnus

Bleak in the River Gade

Largest measured bleak: 18.6 cm

The largest bleak measured in Environment Agency surveys of the River Gade was 18.6 cm, recorded at Cassiobury Park on 6 June 2007.

Across 2,027 measured bleak, the median measured length was 10.4 cm.

Surveyors recorded one individual weight: 3.4 oz (0.095 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 Gade.

See bleak records across England →

Most recent observation11 June 2013Kings Langley · 103 fish

Largest measured bleak: 18.6 cm
Median length: 10.4 cm
Fish measured: 2,027
Survey locations: 2

Individual EA measurements

Largest measured bleak

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
18.6 cm	6 Jun 2007	Cassiobury Park	105543
17 cm	18 Aug 2006	Cassiobury Park	100806
17 cm	18 Aug 2006	Cassiobury Park	100806
16.5 cm	22 Aug 2004	Cassiobury Park	80720
16.5 cm	3 Oct 2000	Cassiobury Park	75768
16.4 cm	17 Sept 2009	Cassiobury Park	118943
16.4 cm	3 Aug 2005	Cassiobury Park	85313
15.3 cm	3 Aug 2005	Cassiobury Park	85313
15.1 cm	3 Aug 2005	Cassiobury Park	85313
15 cm	17 Sept 2009	Cassiobury Park	118943

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

Explore the river

Where bleak were found

Each point marks a survey location with at least one bleak 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 bleak
Kings Langley	15 Jul 2004	11 Jun 2013	2
Cassiobury Park	3 Oct 2000	23 Apr 2013	11

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

2000–2013

Survey records by year

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

100

001

002

103

204

105

106

107

108

209

110

011

012

213

Fish measured by surveyors

Measured length distribution

See how the 2,027 measured fish were spread across different length ranges.

Smallest: 3 cm
Lower quarter: 9.4 cm
Median: 10.4 cm
Upper quarter: 11.3 cm
Largest: 18.6 cm

0–99 mm

760

100–199 mm

1267

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 3.4 oz (0.095 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 Gade

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

Bullhead Minnow 3-spined stickleback Stone loach Brown / sea trout Roach

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 →