Genus: Monodon monocerus: Narwhal or Sea Unicorn. Arctic seas south of the ice-field. The male is characterized by an immense tusk, sometimes 9 feet long, projecting like a spear from the left side of the bluntly-rounded muzzle. The tusk is spirally grooved, and is the source of the horn of the unicorn of heraldry. Mottled in color, and about 18 feet long.
Genus: Delphinapterus leucas: The White Whale or Beluga. Resembles the Narwhal in size, shape, and habitat, but the tusk is absent.
Family Delphinidae
Genus Globiocephala
G. melas: Pilot Whale or Black-Fish or Ca’ing Whale. Temperate or tropical seas. Rounded head with dorsal fin. Takes its name from the fact that one whale or pilot leads the way of the sometimes huge schools; about 25 feet.
Genus Orcinus
O. orca: Killer Whale or Grampus. All seas. With a high dorsal fin and black and white coloring, aggressively bold and carnivorous, with singular cunning and intelligence. Fourteen seals and thirteen porpoises have been found in the stomach of a male measuring 21 feet. The male is usually about 30 feet in length.
Genus Pseudorca
P. crassidens: The False Killer Whale or Lesser Killer Whale. All seas.