Three skulls collected from a Cuvier's beaked whale (right), a Sowerby's Beaked whale (middle) and a Harbour porpoise (left).  All three are toothed whale species but they have very differently-shaped skulls.  The Harbour porpoise (adult length is usually 1.5-1.6 m) is the smallest cetacean found in waters off eastern Canada.  (Thanks to Merel Dalebout, Whitehead Lab, Dalhousie University, for the Cuvier's beaked whale identification.)

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