Nematomorpha
Nematomorpha are a phylum of parasitoid animals superficially similar to nematode worms in morphology. Most species range in size from 50 to 100 millimetres long, reaching 2 metres in extreme cases. Adult worms are free-living, but the larvae are parasitic on arthropods, such as beetles, cockroaches, mantids, orthopterans, and crustaceans.
