The Spermaceti organ found in the heads of sperm whales produces an oily/waxy substance. There can be up to 2 tonnes of oil in each animal. It's also produced in smaller quantities in some other whale species.
Before whaling was made illegal (in most countries) there was a large market for the oil, which was used in lamps, candles, medicines and for specialist lubrication.
There are three main theories regarding its possible function(s).
To date, no theory has been agreed upon.
Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.
If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !
Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.
( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)