Phronima
noun
Phron·i·ma
| \ ˈfränəmə\
Definition of Phronima
: 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
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