Gazelle : The Palestinian Biological Bulletin (ISSN 0178 – 6288) . Number 128, August 2015, pp. 1-18. | Page 11

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Blue whales can reach speeds of 50 kilometres per hour (31 mph) over short
bursts, usually when interacting with other whales, but 20 kilometres per hour
(12 mph) is a more typical traveling speed. When feeding, they slow down to 5
kilometres per hour (3.1 mph) (Wikipedia).
Blue whales most commonly live alone or with one other individual. It is not
known how long traveling pairs stay together. In locations where there is a high
concentration of food, as many as 50 blue whales have been seen scattered over a
small area. They do not form the large, close-knit groups seen in other baleen
species (Wikipedia).

References and internet Websites :
American Cetacean Society Fact Sheet – Blue Whales. Archived from the original
on 11 July 2007.
Animal Records. Smithsonian National Zoological Park. Retrieved 29 May 2007.
Arnason, U. and A. Gullberg (1993). Comparison between the complete mtDNA
sequences of the blue and fin whale, two species that can hybridize in nature.
Journal of Molecular Ecology 37 (4): 312–322.
Arnason, U., Gullberg A. & Widegren, B. (1 September 1993). Cetacean