...In addition, toothed whales have only asingle blowhole... 
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...In the sperm whale, the blowemanates from a blowhole which is displaced to the left of thehead near the front and projects obliquely forward to theanimal's left...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The single blowhole is located well to the left of themidline and far forward on the head...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...In addition, the blowhole of the northernbottlenosed whale is located well back on the head andnot—as in the sperm whale—on the front...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The blowhole is located in an indented area behind thebulbous forehead, and the blow emanating from it projectsupward or slightly forward to a height of up to 6 feet (1...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The blowhole is located far forwardon the top of the head...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...In overall body shape, the head is small with a slightindentation in the area of the blowhole, a slight bulge to theforehead, and a pronounced beak...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The head is characterized by apronounced bulge in front of the blowhole, a slightly concaveforehead, and a moderate to long beak...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The body is long and slender,and the head is narrow and gently tapered from the area ofthe blowhole forward...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...In any case, be careful to leave the blowhole free so thatthe animal can breathe...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
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