Cadlina modesta, common name the modest cadlina, is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Cadlinidae.

[2] This species was described from Point Pinos, California.

It is reported from Point Lena, Juneau, Alaska to Isla Guadalupe, Baja California, Mexico.

[3] The size of the body attains 35 mm.

This Cadlinidae-related article is a stub.