Eduardo Ficaria
Troubadour
I've recently stumbled upon an article talking about a little marine worm that happens to have its biological clock synchronized with the moonlight. I thought it would be interesting, even useful, for those mythic scribes that may happen to be writing about creatures that have behaviors related to the moon phases.
The article also mentions other creatures in our planet that have a "circalunar" clock, and gets into explaining a bit of how this biomechanism works.