Brook lamprey · Lampetra planeri

Brook lamprey in the River R.Bain

Largest measured brook lamprey: 17.7 cm

The largest brook lamprey measured in Environment Agency surveys of the River R.Bain was 17.7 cm, recorded at Hemingby Road Bridge on 7 April 2005.

Across 6 measured brook lamprey, the median measured length was 15.1 cm.

Surveyors recorded weights for 2 brook lamprey. The median was 4.9 oz (0.1375 kg) and the largest recorded weight was 5.3 oz (0.15 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 R.Bain.

See brook lamprey records across England →

Most recent observation11 April 2017Dalderby · 2 fish

Largest measured brook lamprey: 17.7 cm
Median length: 15.1 cm
Fish measured: 6
Survey locations: 7

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
17.7 cm	7 Apr 2005	Hemingby Road Bridge	84488
17.5 cm	7 Apr 2017	Thornton Lock	150356
15.6 cm	21 Mar 2016	Market Bridge (Roman Road)	147926
14.6 cm	11 Apr 2017	Dalderby	150373
13.4 cm	11 Apr 2017	Dalderby	150373
12.2 cm	7 Apr 2005	Hemingby Road Bridge	84488

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
Dalderby	17 Apr 2013	11 Apr 2017	2
Thornton Lock	16 Apr 2013	7 Apr 2017	2
Market Bridge (Roman Road)	11 Apr 2013	21 Mar 2016	2
Shearmans Wath	6 Apr 1994	10 Apr 2013	3
Hemingby Road Bridge	29 Mar 1994	7 Apr 2005	3
Market Stainton Bridge	29 Apr 1997	29 Apr 1997	1
Biscathorpe Ford	23 Mar 1994	24 Apr 1997	2

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

1994–2017

Survey records by year

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

394

095

096

397

098

099

000

001

002

003

004

105

006

007

108

009

010

011

012

413

014

015

116

217

Fish measured by surveyors

Measured length distribution

See how the 6 measured fish were spread across different length ranges.

Smallest: 12.2 cm
Lower quarter: 13.7 cm
Median: 15.1 cm
Upper quarter: 17 cm
Largest: 17.7 cm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 2 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest: 4.4 oz (0.125 kg)
Lower quarter: 4.6 oz (0.1312 kg)
Median: 4.9 oz (0.1375 kg)
Upper quarter: 5.1 oz (0.1438 kg)
Heaviest: 5.3 oz (0.15 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 R.Bain

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

Dace Roach Chub Stone loach Brown / sea trout Pike

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 →