Running through the head are two air passages. Retrieved 19 Jan La Plata dolphin P. Males will fight with each other over females, and males will mate with multiple females, making them polygynous , but they do not dominate the group as in a harem. A Taxonomic and Geographic Reference 3rd ed. Containing Definitions Drawn from the Original Writers: These evolutionary modifications make the spine more flexible but weaker than the spines of terrestrial vertebrates.
Whale Fact Sheet
Belugas are among the most vocal cetaceans. Archived from the original on 20 October Between and , the United States Navy carried out a program that included the study of marine mammals ' abilities with echolocation, with the objective of improving the detection of underwater objects. The majority of belugas live in the Arctic Ocean and the seas and coasts around North America, Russia and Greenland; their worldwide population is thought to number around , Data tags have shown that Cuvier's dive considerably deeper than previously thought, and are in fact the deepest diving species of marine mammal. There is evidence that active sonar leads to beaching.
Beluga whale - Wikipedia
Wikispecies has information related to Delphinapterus leucas. Acoustic survey in fishing Acoustic tag Animal echolocation Beached whale Deep scattering layer Fishfinder Fisheries acoustics Hearing range of marine mammals Marine mammals and sonar Whale song. Retrieved 7 September Garde 1 March Archived from the original on 28 October
Description: Baleen is only found in select species of whale. Archived from the original on 23 December It is not known if these organs are functional or simply vestigial. Data tags have shown that Cuvier's dive considerably deeper than previously thought, and are in fact the deepest diving species of marine mammal. The population has failed to recover, though the reported harvest has been small.