RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Worth

Largest measured brook lamprey: 17.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Worth was 17.5 cm, recorded at Downstream Ponden Mill (WR) on 21 September 2005.

Across 116 measured brook lamprey, the median measured length was 10 cm.

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

See brook lamprey records across England →

Most recent observation3 September 2014Providence Lane · 12 fish
Largest measured brook lamprey
17.5 cm
Median length
10 cm
Fish measured
116
Survey locations
3

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.

LengthSurvey dateSurvey locationSurvey ID
17.5 cm21 Sept 2005Downstream Ponden Mill (WR)86275
15.2 cm10 Oct 2010Downstream Ponden Mill (WR)124706
15 cm10 Oct 2010Downstream Ponden Mill (WR)124706
15 cm17 Sept 2007Providence Lane108148
15 cm21 Sept 2005Providence Lane86281
15 cm21 Sept 2005Providence Lane86281
15 cm3 Sept 2003Downstream Ponden Mill (WR)78859
14 cm10 Oct 2010Downstream Ponden Mill (WR)124706
14 cm17 Sept 2007Providence Lane108148
14 cm17 Sept 2007Providence Lane108148

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 surveyedFirst recordedLast recordedVisits finding brook lamprey
Providence Lane21 Sept 20053 Sept 20145
Downstream Ponden Mill (WR)3 Sept 200310 Oct 20106
Hermit Hole12 Aug 200912 Aug 20091

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

2003–2014

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 116 measured fish were spread across different length ranges.

Smallest
5.5 cm
Lower quarter
8.5 cm
Median
10 cm
Upper quarter
12 cm
Largest
17.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Worth

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

Brown / sea trout Bullhead

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 →