Fiona pinnata is found in all seas worldwide, on many different kinds of floating objects.
The type locality is the … See more

A 2016 study showed that this species is a species complex, but did not name the segregate species.
Various names have been created for this species. Limax by Peter Forsskål from 1775 was … See more

The body is elongated and oblong-elliptical. The length of the body is usually about 20 mm, but the largest reported size of the body is 50 mm. Dimensions of a specimen with a total length of 31.7 mm are as follows: 17.… See more

This nudibranch is pelagic in a similar way to the nudibranch Glaucus atlanticus. Unlike some other pelagic animals, this species cannot swim or even float in water by itself, thus although it is pelagic, it is not considered … See more

• Bayer, F. M. (1963). "Observations on pelagic molluscs associated with the siphonophores Velella and Physalia". Bulletin of Marine Science of the Gulf and Caribbean, University of Miami 13 (3): 454-466.… See more

• Pelagic snails: the biology of holoplanktonic gastropod mollusks By Carol M. Lalli, Ronald W. Gilmer. via Google books
• Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, … See more