Not valid. Described from tuna, Germo alalonga (= Thunnus alalonga), Mediterranean. Falls within the length and variability range of P. filosa (also found frequently on species of large tunas). There is nothing within the original description, figures and remarks which distinguishes P. germonia from P. filosa. Synonym of P. filosa (Kabata 1979; Hogans 1988a); accepted as P. filosa (Walter & Boxshall 2015).