When it is used in relation to certain dorid nudibranchs such as Peltodoris nobilis, it means the nodules on the dorsum of the animal.
Laurus nobilis | Pinna nobilis | Peltodoris nobilis | Hepatica nobilis | Steatoda nobilis | ''Peltodoris atromaculata'' between ''Parazoanthus | Live specimen of ''Pinna nobilis'', in Levanto, Liguria | Lebeda nobilis | Deckenia nobilis | Banksia nobilis |
One example of a discodoridid is the "Pacific sea lemon" or "speckled sea lemon", Peltodoris nobilis, which occurs off the coast of British Columbia to Baja California from low-tide waters to a depth of about 200 m.