What is the habitat of platyhelminthes?
platyhelminthes live in ocean
Platyhelminthes as a phylum is divided into 4 classes. The tapeworm class (Cestoda) is endoparasitic. This means they live parasitically inside a host. There is also the ectoparasitic class Monogenea which lives parasitically on the outside of a host. There are marine specimens and those that live in other moist environments. This is the class Turbellaria.
"Platyhelminthes have developed a number of adaptations which made them suitable for their parasitic mode of life. Their thick body covers protect them against defense mechanisms of host body. The spines, suckers and hooks developed for attachment and replace the locomotory organs which are not needed by parasitic animals."