 "Porrhothele antipodiana" is known to be parasitized by "Aranimermis giganteus", a nematode that parasitizes the Mygalomorphae of New Zealand.Individuals infected with the parasite seem to become attracted to water, which inevitably causes them to drown, allowing the "A. giganteus" to complete the aquatic stage of its life cycle.A considerable source of mortality in these spiders can be attributed to spider-hunting wasps, especially "Priocnemis monachus".