Man.
Maybe. Fantasy story most times talk about them as they were really living in our world. But nobody is sure that this scary creature really lives in our world.
possibly plankton
human female's
it maybe be the African giraffe, it may be another living creature
Snail
Human
A dorado
Depends. Fish, or any other living creature close to the strike will most likely die. A bit further away, nothing happens. Somewhere inbetween it'll be unpleasant and harmful but survivable.
Most of them will eat many living oceanic creature but most of the times the creatures have to be smaller than themselves for the man of war to be able to consume the creature
they is n a fece
non living
the most harmful disease in the world is cancer (it kills the most people).