The Kamo Kamo no Mi, Model: Platypus is a Zoan-type Devil Fruit that allows the user to transform into a platypus. The name is derived from kamonohashi, the Japanese word for "platypus", which in turn is derived from kamo, Japanese for "duck". And yes, TheShrubberyDemander is fully aware that the platypus and the duck are nowhere near close to related, but the name is really for simplicity purposes.