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Mammals
Whales
2 Families Odontoceti (toothed whales) 67 species One opening for blowhole Mysticeti (baleen whales) 11 species Two openings for blowhole.
Whales, Dolphins and Porpoises Whales, dolphins and porpoises are cetaceans (Class Mammalia, Order Cetacea) Of all the marine mammals, cetaceans (and sirenians)
Feeding and Echolocation in Whales
The Marine Ecosystem. Ocean Overview Oceans cover three quarters of the Earth's surface, and they are as diverse as they are large. The ocean is a complicated.
The colossal Squid ( Mesonychoteuthis hamiltoni )
