How big is a sperm whale
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The sperm whale (Physeter macrocephalus) or cachalot /ˈkæʃəˌlɒt, ˈkæʃəˌl oʊ/ is the . 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.
The sperm whale has the largest brain of any creature known to have lived on Earth. Their heads also hold large quantities of a substance called spermaceti.
Description:Owing to extensive whaling, sperm whale size has decreased dramatically, mostly because the largest males were killed first and most intensively, for they had more spermaceti. Sperm whales are believed to be able to dive up to 3 kilometers 1. Retroposon analysis of major cetacean lineages: Are sperm whales social? The four-chambered heart of the average sperm whale weighs about pounds kg - about as much as two average adult human beings. It is hypothesized that before the whale dives, cold water enters the organ, and it is likely that the blood vessels constrict, reducing blood flow, and, hence, temperature. There are no ciliary muscles.