Lombardo, A.; Marletta, G. Observations on the Ghost Fishing in Two Species of Marine Heterobranchs (Mollusca Gastropoda): Aplysia Depilans Gmelin, 1791 (Aplysidae) and Umbraculum Umbraculum ([Lightfoot], 1786) (Umbraculidae). Intl. J. Aquat. Biol. 2022, 10, 384-387.