Aporodoris millegrana is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusk in the family Discodorididae.

[7][8] This species was originally discovered and described (under the name Doris millegrana) by Joshua Alder and Albany Hancock in 1854.

This species occurs in European waters: British Isles, France, Tenerife, Spain, Mediterranean Sea.

[1] Alder's and Hancock's original text (the type description) reads as follows:[1] Doris millegrana Yellow or orange?

: cloak covered with minute granular tubercles: oral tentacles linear: branchial plumes 6, bipinnate, retractile within a cavity.