[3] A similarly coloured species is found in Indonesia, the Philippines and Thailand.

[4][5] Antonietta janthina has a pink-purple body with white surface pigment.

The numerous cerata have purple digestive gland inside them and superficial white or pale yellow pigment covering the tips.

The oral tentacles are bright yellow and there is a median band of the same colour on the head.

[3] This species can reach a total length of at least 10 mm.