Brook lamprey · Lampetra planeri

Brook lamprey in the Black Brook

Largest measured brook lamprey: 17.2 cm

The largest brook lamprey measured in Environment Agency surveys of the Black Brook was 17.2 cm, recorded at Froom Street on 16 June 2011.

Across 19 measured brook lamprey, the median measured length was 11.1 cm.

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

See brook lamprey records across England →

Most recent observation11 September 2013Froom Street · 2 fish

Largest measured brook lamprey: 17.2 cm
Median length: 11.1 cm
Fish measured: 19
Survey locations: 1

Individual EA measurements

Largest measured brook lamprey

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
17.2 cm	16 Jun 2011	Froom Street	126727
15 cm	12 Jun 2013	Froom Street	136379
13.5 cm	8 Jun 2010	Froom Street	122573
13 cm	12 Jun 2013	Froom Street	136379
12.2 cm	8 Jun 2010	Froom Street	122573
12 cm	12 Jun 2013	Froom Street	136379
12 cm	3 Sept 2010	Froom Street	123658
12 cm	3 Sept 2010	Froom Street	123658
11.5 cm	22 Oct 2012	Froom Street	134897
11.1 cm	15 Sept 2011	Froom Street	128043

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

Explore the river

Where brook lamprey were found

Each point marks a survey location with at least one brook lamprey 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 brook lamprey
Froom Street	8 Jun 2010	11 Sept 2013	7

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

2010–2013

Survey records by year

Each bar shows how many survey visits recorded brook lamprey that year.

210

211

112

213

Fish measured by surveyors

Measured length distribution

See how the 19 measured fish were spread across different length ranges.

Smallest: 8 cm
Lower quarter: 10.6 cm
Median: 11.1 cm
Upper quarter: 12.1 cm
Largest: 17.2 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Black Brook

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

Brown / sea trout European eel Perch Chub Roach Gudgeon

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 →