RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the Loxwood Stream

Largest measured brook lamprey: 18.6 cm

The largest brook lamprey measured in Environment Agency surveys of the Loxwood Stream was 18.6 cm, recorded at Dunsfold (loxwood stream) on 22 July 2004.

Across 67 measured brook lamprey, the median measured length was 14 cm.

Surveyors recorded weights for 65 brook lamprey. The median was 0.2 oz (0.005 kg) and the largest recorded weight was 0.4 oz (0.01 kg).

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

See brook lamprey records across England →

Most recent observation7 August 2013Upper Ifold Farm sq · 2 fish
Largest measured brook lamprey
18.6 cm
Median length
14 cm
Fish measured
67
Survey locations
6

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
18.6 cm22 Jul 2004Dunsfold (loxwood stream)80802
18.2 cm22 Aug 2007Loxwood107137
17 cm27 Jul 2006Dunsfold (loxwood stream)102057
16.8 cm18 Jul 2005Dunsfold (loxwood stream)86905
16.3 cm18 Jul 2005Dunsfold (loxwood stream)86905
16.3 cm7 Jul 2005Highstreet Green sq87061
16 cm14 Sept 2010Loxwood124374
16 cm22 Jul 2004Dunsfold (loxwood stream)80802
15.5 cm27 Jul 2006Dunsfold (loxwood stream)102057
15.5 cm27 Jul 2006Dunsfold (loxwood stream)102057

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
Upper Ifold Farm sq7 Aug 20137 Aug 20131
Pockford Farm sq7 Aug 20137 Aug 20131
Highstreet Green sq7 Jul 20057 Aug 20132
Frillinghurst4 Jul 20134 Jul 20131
Loxwood22 Aug 200714 Sept 20103
Dunsfold (loxwood stream)25 Jul 200227 Jul 20065

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

2002–2013

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 67 measured fish were spread across different length ranges.

Smallest
10.2 cm
Lower quarter
13.1 cm
Median
14 cm
Upper quarter
15.3 cm
Largest
18.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 65 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.1 oz (0.004 kg)
Median
0.2 oz (0.005 kg)
Upper quarter
0.2 oz (0.007 kg)
Heaviest
0.4 oz (0.01 kg)

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

More fish in this river

Explore the Loxwood Stream

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

Stone loach Bullhead Minnow Brown / sea trout Gudgeon 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 →