The hydras are gone.
there is not even hydras on clubpenguin
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
they have exoskeleton
They are gone.
Yes.
The kingdom is animalia.
Yes; many cnidarians have an exoskeleton.
hydras carry out asexual reproduction (binary fission) whereas mammals carry out sexual reproduction (mating)
invertibrates
They are gone.