By Gabriel Barathieu - https://commons.wikimedia.org/w/index.php?curid=24212362
By Julian Ilcheff Borissoff - https://commons.wikimedia.org/w/index.php?curid=4472324
The lower jaw is long and narrow. The teeth fit into sockets along the upper jaw.
By Phoenix_PNX - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=21081966
Walvis Potvis
They are both the biggest and the largest toothed predator. Males reach maturity at an average length of 16 meters (52 feet), with the head accounting for up to one-third of the total length. It is the third-deepest diving mammal, plunging to 2,250 meters (7,382 feet).
It has a brain that is more than five times heavier than a human's brain and it has the biggest brain on earth, weighing on average about 7.8 kilograms (17 lb). Whales can live for up to 70 years.
It was a top target for the whaling business because of its sperm oil, which was sought after for use in oil lamps, lubricants, and candles.
Various types of vocalization characteristics can be found at the wikipedia reference below.
Females and their offspring dwell in matriarchal groups called pods, similar to how elephants do, whereas bulls live apart. Bulls occasionally gather in informal bachelor groups with other big, mature males. As they age, they normally lead solitary lives, coming to the pod only to interact with others or to reproduce.
The most common natural predator of sperm whales is the orca (killer whale).
Before commercial sperm whaling started in the early 18th century, historians believe that there were 1,100,000 sperm whales living on earth.
Over 200,000 sperm whales were killed by the various whaling nations in the 19th century. In the 20th century, at least 770,000 were killed. The recovery process will be long. In recent times some of these beached whales have been found with plastic in their stomachs.
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Sources:
(*) https://en.wikipedia.org/wiki/Sperm_whale(*) https://www.inaturalist.org/taxa/74890-Physeter-macrocephalus
(*) https://animalia.bio/sperm-whale