Oysters could be following the lunar cycles
Werewolves respond to moonlight and Who else? Oysters it seems - interesting science news

In addition to having a circadian clock and a tidal clock, oysters also have a lunar clock which influences the opening and shutting of the shells. Researchers tracked the behavior of 12 Pacific oysters submerged in France over three and a half lunar cycle for study this phenomenon.

They found that oysters are most open in the presence of a new moon and least open as the moon entered the first quarter and full phase indicating that they can sense the moonlight even if it has less intensity compared to sun rays.

The scientists further indicate that moonlight levels might influence the possibility of more food being available during low light levels.

Read the full story: Gaurdian
Scientific publication: Biology Letters