Go to 27

b. Dorsal fin located near midpoint of back; head long Go to 28

27. a. Flippers one-fifth of body length, or more.
Atlantic pilot whale, p. 91

b. Flippers one-sixth of body length, or less.
Short-finned pilot whale, p. 94

28. a. Flipper has distinctive hump on forward margin; 8-11 prominent
teeth curved backwards and inwards, in each upper and lower jaw.
False killer whale, p. 88

b. Flipper lacks distinctive hump on forward margin; 10-25 teeth
in each upper and lower jaw Go to 29

29. a. 8-13 teeth in each jaw.
Pygmy killer whale, p. 138

b. 20-25 teeth in each upper jaw, 21-24 teeth in each lower jaw.
Many-toothed blackfish, p. 142

30. a. Beak short, usually less than about 1 inch (2.5 cm) Go to 31

b. Beak more than 1 inch (2.5 cm) Go to 33

31. a. Flippers very short; dorsal fin small and triangular; 38-44
teeth in each jaw; body to at least 8 feet (2.4 m); distinct
black stripe from beak to area of anus; in profile beak shows
very little separation from forehead.
Fraser's dolphin, p. 120

b. Flippers long relative to body length; dorsal fin tall and
distinctly falcate; 22-40 teeth in each jaw; in profile, beak
shows distinct separation from forehead.
(_Lagenorhynchus_ sp.) Go to 32

32. a. 22-28 teeth in each jaw; dorsal fin all black; body to about
10 feet (3.1 m).
White-beaked dolphin, p. 126

b. 30-40 teeth in each jaw (some animals have greater number in
upper than in lower jaw); dorsal fin part gray, part black; body
to about 9 feet (2.7 m).
Atlantic white-sided dolphin, p. 123

33. a. 20-26 teeth in the upper jaws; 18-24 in the lower jaws; body
to 12 feet (3.7 m); teeth may be extensively worn.
Atlantic bottlenosed dolphin, p. 128

b. 26 or more teeth in both upper and lower jaws Go to 34

34. a. 29-36 teeth in each upper jaw; 28-36 in each lower jaw.
(Spot