Peltodoris nobilis, commonly called the sea lemon, false sea lemon, or the noble dorid, is a species of colorful sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae. This species was previously placed in the genus Anisodoris and was known for a long time as Anisodoris nobilis. Subsequently it was known as Diaulula nobilis.
This animal gives off a pleasant citrus smell when it is handled, and this (along with its yellow coloration) is what is responsible for the common name "sea lemon". Its diet includes Mycale adhaerens, the purple scallop sponge
Peltodoris nobilis. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Peltodoris_nobilis.