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Walvisachtigen | De Zoogdiervereniging
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Cetacea - IWC
Walvisachtigen - Animalia
World Cetacea Database - Intro - World Register of Marine Species
General features of cetaceans | Britannica
WEBCetaceans are aquatic placental mammals that include whales, dolphins and porpoises. Learn about their physical characteristics, suborders, distribution and more from Britannica's article summary.