Miamira magnifica is a species of colourful dorid nudibranch, a sea slug, a shell-less marine gastropod mollusk in the family Chromodorididae. Previously synonymised with Ceratosoma this genus is considered valid on the basis of molecular phylogeny.
This species was described from the Seychelles.
The differences between this species and Miamira sinuata and Miamira flavicostata are not clear.