Sperm whale . Myoglobin, which stores oxygen in muscle tissue, is much more abundant than in terrestrial animals. The blood has a high density of red blood cells, which contain oxygen-carrying haemoglobin. The oxygenated blood can be directed towards only the brain and other essential organs when oxygen levels deplete. The spermaceti organ may also play a role by adjusting buoyancy (see below). The arterial retia mirabilia are extraordinarily well-developed. The complex arterial retia mirabilia of the sperm whale are more extensive and larger than those of any other cetacean. Atop the whale's skull is positioned a large complex of organs filled
Giglioli's Whale year. In 1983 between Corsica and the French mainland, French zoologist Jacques Maigret sighted a similar looking creature. Although it has not been proven to exist, it was given a "classification" by Giglioli. However, scientists would most likely classify the whale under Balaenopteridae, large baleen whales. The whale may have been a genetic mutation, similar to humans born with polydactyly. Giglioli's Whale Giglioli's Whale ("Amphiptera pacifica") is a purported species of whale observed by Enrico Hillyer Giglioli. It is described as having two dorsal fins. The species is not recognized by the general scientific community. On September 4, 1867 on