The sperm whale is a marine aquatic mammal that belongs to the order Whale, the suborder Toothed Whale, and is the only member of the genus of the same name. Sperm whale once had the scientific name Physeter catodon. It is one of three extant species of the superfamily Sperm whales, along with the small sperm whale and the dwarf sperm whale.

Sperm whales belong to the Order Whale, the suborder Toothed Whales (which includes dolphins and other toothed whales) and is the only member of the family Sperm whales and of the genus of the same name. There are two species of “sperm fish” closely related to it, the small sperm whale and the dwarf sperm whale of the family Small sperm whale and genus of the same name. In some other taxonomic systems, small/dwarf sperm whales and “large” sperm whales are placed in the superfamily Sperm whales.

Cá nhà táng tấn công tàu săn bắt

Sperm whales were among the first animals described in Linnaeus’ Systema Naturae in 1758. Linnaeus thought at the time that there were four species in the genus, but it wasn’t long before scientists realized that there were only four species of sperm whales. There is a single species of sperm whale that exists. Two names P. catodon and P. macrocephalus – two of the four that Linnaeus used to describe the “species” of sperm whales – were proposed and they are still used in parallel, but recently the scientific community has mainly using the name macrocephalus as the official name and catodon’ being a less commonly used synonym.

Sperm whales are the largest toothed whales in the world, with males measuring 13-16 meters long, and weighing 35-50 tons. Meanwhile, the second largest toothed whale is the baird whale, which is only 12.8 meters (42 ft) long and weighs 15 short tons (14,000 kg). The Nantucket Whale Museum still holds a sperm whale jawbone up to 5.5 meters (18 ft) long.

Large-scale whaling – especially after World War II – probably reduced the average size of sperm whales because large males are often hunted by hunters. Currently, male sperm whales typically do not exceed 18.3 meters (60 ft) long and weigh more than 51,000 kilograms (50 long tons; 56 short tons). Others argue that overhunting actually has no effect on the size of male sperm whales and that in fact their size should have increased due to reduced individual densities and thus the number of sperm whales. feed divided by fish head will increase.