Did you mean: Polymorphism
Polymorphida
Animal
Polymorphida are an order of thorny-headed worms. The adults of these parasitic platyzoans feed mainly on fish and aquatic birds.
This order contains 5 families:
Centrorhynchidae Van Cleave, 1916
Isthomosacanthidae Smales, 2012
Plagiorhynchidae... Wikipedia
Higher classification: Palaeacanthocephala
Order: Polymorphida; Petrochenko, 1956
Scientific name: Polymorphida
Lower classifications