Perna may refer to: Perna (surname) Perna, Bosanska Krupa, a village in Bosnia and Herzegovina Perna, Croatia, a village near Vrginmost, Croatia Perna, Poland, a village in Kutno County, Poland Perná a village in Břeclav District, Czech Republic Pernå, a municipality in Finland Perna caste, a Hindu caste in India Perna-de-pau, a population of native Portuguese-speakers, recognized as Indians in 1993 Perna Krick (1909–1991), American sculptor, painter and teacher Perna (bivalve), a genus of saltwater mussel Perna perna, an economically important mussel, a bivalve mollusc belonging to the family Mytilidae Perna canaliculus, the New Zealand green-lipped mussel Perna viridis, the Asian green mussel