Doto hydrallmaniae is a species of sea slug, a nudibranch, a marine gastropod mollusc in the family Dotidae.
This species was first described from the Isle of Man, United Kingdom.
This nudibranch is translucent white with dark red spots on the ceratal tubercles. Its body size attains 10 mm.
Doto hydrallmaniae feeds on the hydroid Hydrallmania falcata, family Sertulariidae.