|Place of origin||Ocean|
|Behind the scenes|
|Universe||The Shadow Over Innsmouth|
|Created by||H. P. Lovecraft|
Mother Hydra is a feminine deity worshiped by the church of the Esoteric Order of Dagon, alongside Father Dagon. Nothing is known about her appearance, nature, or even whether she actually exists, but it's very likely that she represents Dagon's consort.
- "The Shadow Over Innsmouth", by H. P. Lovecraft (1931) (Mentioned only)
- She is named after the mythological Hydra.