The body is completely white, although the presence of food in the intestine may give it a temporary different color.

The eyes are seen as two dorsal black dots wide apart right in front of the constriction that separates the head from the body.

[1] Dendrocoelum lacteum is widely distributed across Europe in all sorts of freshwater bodies.

The main component of its diet seems to be freshwater isopods of the genus Asellus and their presence in a water body appear to be essential for the occurrence of the planarian.

[3] Other ingested invertebrates include amphipods of the genus Gammarus and, less frequently, freshwater oligochaetes.