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On 15 May 2013, on the beach near Calheta de Baixo, Maio Island, Cape Verde Islands (15º13ʹ20ʺN, 23º13ʹ12ʺW), the remains of a stranded cetacean were found. The animal had been butchered by local inhabitants and most of the flesh and blubber, as well as the intestines, had been removed, while the tail fluke had been chopped off. However, with the skull still present, it was immediately clear that it concerned a beaked whale Mesoplodon sp. The single pair of teeth (one of which was broken) placed back from the apex in the lower jaw allowed the animal to be identified as a male Gervais' beaked whale M. europaeus (Gervais, 1855).
Mobulinae rays are part of Cabo Verde native biodiversity and belong to two extant genera, Manta and Mobula (Paig-Tran et al. 2013, Ward-Paige et al. 2013). Mobula spp. can be distinguished from Manta spp. by the mouth position, the shape of the cephalic fins and body size (Stevens 2011). Despite their large size, little is known about their population trends and precise distribution. They are particularly difficult to study in the wild and have restricted distributions (Ward-Paige et al. 2013, Croll et al. 2015).