Phronima
noun
Phron·i·ma
ˈfränəmə
: a genus (the type of the family Phronimidae) of pelagic amphipod crustaceans having one known member (P. sedentaria) that lives in a barrel-shaped case made from the swimming bell of a siphonophore or the test of a tunicate
Word History
Etymology
New Latin, from Greek phronimos sane, sensible; probably akin to Greek phren-, phrēn diaphragm, mind