The name of this multi-headed water serpent means "water serpent"
The Hydra of Lerna with its multiple heads represents the Water-snake 
which... [DOC] [TLE] The Seven Serpents (creatures) | Titannica | Fandom powered by ... [PAR] The Seven Serpents are the seven resurrected heads of an immensely powerful 
... Water Serpent: The head of the Hydra that was consecrated to Hydana.