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Gervais’ beaked whale Mesoplodon europaeus (Gervais, 1855) is restricted to the Atlantic Ocean. Although most records are from the North Atlantic, it is probably continuously distributed in deep warm waters around the equator (Mead 1989, Norman & Mead 2001). Its occurrence in West Africa is poorly known, as records are rare. It is classified as Data Deficient (Taylor et al. 2008).
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).