Анотация: Between1996 and 2012, a total of eleven bottlenose dolphins (Tursiops truncatus) were found dead in the Slovene sea. Only nine animals were dissected, since two were unsuitable for further examination due to severe post-mortal decomposition. Of the dissected dolphins, six were female and three were male; seven animals were adults, one subadult and one was a calf. At the dissection, pathological lesions in the lung prevailed; we established verminous pneumonia (N=5), lung worms in the bronchi (N=3), and multifocal nodular calcifications, probably calcified parasitic nodules (N=2). Among other pathological lesions, erosive and ulcerative oesophagitis (N=3); ulcerative gastritis (N=2); cutting injuries, excoriations and cicatrisations of the skin (N=2) were the most numerous. The most common histopathological lesions were also associated with parasites; we diagnosed parasitic nodules (N=3), verminous pneumonia (N =3) and bronchitis (N=1), and parasites in the lumina of bronchi (N=1). In six cases, parasitological examination revealed a presence of lung worms of he Metastrongyloideasuperfamily. We concluded that five bottlenose dolphins died of verminous pneumonia caused by nematodes of the order Strongylida, superfamily Metastrongyloidea; one animal died of chronic ulcerative oesophagitis and gastritis; one died after having been caught in a fishing net; one died due to endoparasitosis and emaciation, whereas the exact cause of death of one bottlenose dolphin could not be established due to severe post-mortal decomposition