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Both species lack a dorsal fin, one of the very few cetaceans to have that distinction. It was that, plus the black coloration when seen at the surface, which gave them a very vague resemblance to [[right whale]]s, hence the name.
Both species lack a dorsal fin, one of the very few cetaceans to have that distinction. It was that, plus the black coloration when seen at the surface, which gave them a very vague resemblance to [[right whale]]s, hence the name.
The two species are on opposite sides of the globe. The northern species is found in the waters of the north Pacific Ocean, from the Kamchatka peninsula and northern Japan eastward to Canada and the United States, as far south as Baja California in Mexico. The southern species lives within the latitudes of about 40° to 55° south.
The two species are on opposite sides of the globe. The northern species is found in the waters of the north Pacific Ocean, from the [[Kamchatka]] peninsula and northern Japan eastward to Canada and the United States, as far south as Baja California in Mexico. The southern species lives within the latitudes of about 40° to 55° south.
Both species are pelagic; if they are seen near coastlines they are within access to deep water. They are found in pods of 100 to 300 individuals, with some pods observed to be in excess of 3,000.
Both species are pelagic; if they are seen near coastlines they are within access to deep water. They are found in pods of 100 to 300 individuals, with some pods observed to be in excess of 3,000.