Tyrinna burnayi is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.

[1] Tyrinna burnayi has a translucent blue body with white viscera shining through.

The edge of the mantle is covered in its entirety by a thin orange band, next to which there are internally conspicuous white spots (subepidermal glands) of varying size.

[1] The head has two deeply grooved palps and the foot is crossed transversely at its anterior edge and slightly protrudes from its posterior part, its end being pigmented white.

The rhinophores have white apices and translucent bases, with 18–20 orange lamellae in the larger specimens.