Body to i6 m long. 



Body dark; back smooth and finless. 



Chin and belly often white. 



Head lacks callosities. 



Baleen dark gray with gray fringes, to 4 m or longer. 



Upperjaw arched and lower lip strongly bowed. 



Two blowholes clearly separated; blow projects upward in wide V-shape 



Distribution restricted to arctic waters. 



Tail stock often ringed with white or gray. 



Flukes, all dark, raised on longer dives. 



BowHEAD Whale 



Balaena myslictlus (P) 



Body to 16 m long. 



Body from dark to light gray and sometimes mottled, often with 



irregular white patches, especially on ventrum; back smooth 



and finless. 

 Callosities (the largest of which is called the bonnet and is set on 



top of the snout) present on head and lower jaw, covered with 



cyamid crustaceans ("whale lice"). 

 Baleen usually dark gray with dark fringes, to i.z m long, 



sometimes appears pale brownish to yellowish-gray in color 



when viewed through water. 

 Upper jaw arched and lower lip strongly bowed. 



Two blowholes clearly separated; blow projects upward in wide V-shape 

 Previous distribution extended from southern Bering Sea to 



southern Oregon with stragglers to California, Baja California, 



and Hawaii; current distribution unknown but appears to be 



severely restricted. 

 Flukes all dark, raised on longer dives. 



Right Whale 

 Euhalaem glacialis (B) 



With a Dorsal Fin 



MEDIUM-SIZED WHALES f to i ? meters maximum length) 



There are at least i; species of medium-sized whales with a dorsal 

 fin known from the eastern North Pacific. These species, taking many 

 diverse forms, range in maximum adult size from about 4 m (Risso's 

 dolphin) to about ij m (Baird's beaked whale). This group includes 

 such widely distributed and frequently encountered species as the pilot 

 whale, false killer whale, and minke whale, and such rarely encountered 

 and poorly known species as the various "beaked whales." 



Aside from their common inclusion within the stated size range and 

 the presence of a dorsal fin (which ranges from only a small nubbin in 

 some of the beaked whales to a substantial 1.5-1.8 m "sail" on adult 

 male killer whales) in all apecies, these species have little in common. 

 Therefore, each is placed in the guide in near proximity to those 

 species with which it is likely to be confused in the field. 



Illustrations in the Medium-sized Whales section are at a scale of 1:60 



40 



