Wikipedia
Cliidae
The family Cliidae is a taxonomic group of small floating sea snails, pelagic marine opisthobranch gastropod mollusks.
This family name has for a long time been known as Clioidae, or the subfamily Clioinae Jeffreys, 1869 belonging to the family Cavoliniidae, each time with the type genus Clio Linnaeus, 1767. Unfortunately this is often confused with another molluscan family Clionidae, which has the type genus Clione. The International Commission on Zoological Nomenclature (ICZN) has therefore changed the name back to its original spelling Cliidae Jeffreys, 1869, type genus Clio Linnaeus, 1767