Marionia kinoi is a species of sea slug, a dendronotid nudibranch, a marine gastropod mollusc in the family Tritoniidae.

[2] This species was described from a site two miles south of Punta Arenas, Gulf of California coastline east of La Paz, near La Riviera, Baja California Sur, Mexico (23°29′24″N 109°27′08″W / 23.49000°N 109.45222°W / 23.49000; -109.45222), 16 m depth.

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