No hydras never existed it is just a Greek myth; in the story Hercules and the 12 labors he killed a hydra by slicing its head of and burning his neck so no more heads would grow.
no
no
The hydras are gone.
Yes.
there is not even hydras on clubpenguin
No, yaks aren't extinct.
Lemuria.
because of lack of food
Hydras do not have a skeleton. They are multicellular organisms that belong to the phylum Cnidaria and are characterized by a simple body structure without bones or hard structures. Hydras have a flexible body made up of a layer of cells surrounding a central digestive cavity.
hydras have testes to produce and release sperm and ovaries to produce and release eggs
EXTINKED? ITS EXTINCT WOW AND NO THEY ARE NOT GIRAFFES ARE AWESOME
Yes.