Dendrocoelum lacteum


This flatworm can be over 2cm in length and is very sticky due to the mucus it produces to help it glide and also to put off potential predators. It is milky white with its gut a more dense white.

Identification difficulty

Almost anywhere there is water particularly in lakes and rivers.

When to see it

All year round.

Life History

Mainly predatory on crustacea, but also on other species.

UK Status

Widespread in most of Britain

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map