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
Mesoplodont whale what effect this has on the population. Longman's beaked whale ("Indopacetus pacificus", also known as the Indo-Pacific beaked whale or the tropical bottlenose whale) was originally assigned to "Mesoplodon", but Joseph Curtis Moore placed it in its own genus, "Indopacetus", a taxonomic assignment which has been followed by all researchers. Two extinct species of "Mesoplodon" are known, "M. posti" and "M. slangkopi". Mesoplodont whale Mesoplodont whales are fifteen species of toothed whale in the genus Mesoplodon, making it the largest genus in the cetacean order. Two species were described as recently as 1991 (pygmy beaked whale) and 2002 (Perrin's beaked