Whale bodies taper at the front and back. Head shapes are variable. The taper in the tail starts near the dorsal fin and slope more on the top than the bottom. The taper is gradual in most species, but in the Blue Whale, the tail stalk remains thick for most of its length, then suddenly snaps to the tail: thick, thick, thick, thin! Note the sharp face of the Minke, the scooped throat of the Humpback, and the blunt face of the gray.