They are both worms.
The hydras are gone.
there is not even hydras on clubpenguin
facts about flatworms
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
Yes flatworms are invertebrates
Flatworms are in the Platyhelminthesphylum.
Yes.
The kingdom is animalia.
They are gone.
The scientific name for flatworms is Platyhelminthes.