Leatherbacks are neat animals!
DID U KNO? the Leatherback sea turtle has a third eye! well not really...the Leatherback has a lightly pink spot on the top of its head directly above their brain. this spot is so thin that it is thought that this spot allows light to reach the pineal gland which may be used for migration.
The pineal gland is an endocrine gland found in vertebrates which affects wake/sleep patterns and functions to signal day length. This combined with a change in temperature can signal a change in day length and season which indicates migration time.
link: https://www.smithsonianmag.com/smart...lls-180952703/
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