Blue shark and sperm whale

The sperm whale's distinctive shape comes from its very large, block-shaped head, which can be one-quarter to one-third of the animal's length. Clicks are generated by forcing air through a pair of phonic lips also known as "monkey lips" or "museau de singe" at the front end of the nose, just below the blowhole. Females become fertile at around 9 years of age. Environmental Conservation Online System. But killer whales are brutal in their dedication to hunting down food. Currently, entanglement in fishing nets and collisions with ships represent the greatest threats to the sperm whale population.

Archived from the original on National Parks Conservation Association. American Association for the Advancement of Science. When it comes to the baleen whale species there are a number of characteristics that prevent them from successfully hunting sharks.

The longest Blue whale recorded was But strike a member of the harem school, and her companions swim around her with every token of concern, sometimes lingering so near her and so long, as themselves to fall a prey. In June , a female blue whale estimated at Pygmy right whale C.

The complex arterial retia mirabilia of the sperm whale are more extensive and larger than those of any other cetacean. Annual Review of Physiology. Currently, entanglement in fishing nets and collisions with ships represent the greatest threats to the sperm whale population. Slow clicks are heard only in the presence of males it is not certain whether females occasionally make them. You may also like. It is still highly valued as a fixative in perfumes and other uses. Herman Melville 's fictional story Moby Dick suggests that the "case" containing the spermaceti serves as a battering ram for use in fights between males.