User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-75.70.4.192-20120322221029/@comment-4768658-20120323014545

to anwser dark jinouga, my best guess would be some form of echolocation like what whales and dolphins use. ceadeus has a very deep set of vocals like whales do so i wouldn't find it hard to believe if it possesed the ability to use echolocation like them, plus its hood could act like a reciever for the sound waves it emits due to its size and position near the head.

of course that's just a guess.....