Holthuis and more recent discussions with relevant experts. The complex arterial retia mirabilia of the sperm whale are more extensive and larger than those of any other cetacean. The case can hold within it up to 1, litres of spermaceti. However, due to the distinctive look and large size of the whale, watching is increasingly popular. If sperm whales detect silhouettes, Fristrup and Harbison suggested that they hunt upside down, allowing them to use the forward parts of the ventral visual fields for binocular vision. Teeth Another synonym australasianus " Australasian " was applied to sperm whales in the southern hemisphere. Such coastal groups were more abundant in pre-whaling days.
An extraordinary battle between sperm whales and orcas – in pictures
The choroid is very thick and contains a fibrous tapetum lucidum. Elephants and dolphins also have larger brains than humans. This recycling of air allows the whale to continuously generate clicks for as long as it is submerged. They occurred often in necklaces. Accessed 21 October Male adult sperm whales have been known to attack killer whales to compete for food.