The Golden Hamster displays lunar rhythms in activity, and urinary volume and acidity. . The Moon has been a boon to hunters and fishermen. Sea creatures show a high lunar sensitivity. Their reproductive cycles are affected by the rhythms of the Moon. Exact lunar rhythms have been demonstrated in the reproductive cycles of fish.
Oysters open their shells at high tide.
Shrimpers are out in masse every full moon, because at this time they predictably rise to the surface to feed. It seems natural that sea creatures would be most affected because of ocean tides. Animal studies show that physical activity, metabolism, aggression and sexual behavior are dramatically increased in many species at the new and full Moon. Predators like the wolf are active at the full moon, a well known fact to trappers. The moon-phase cycle is the key cycle in the timing of plant, animal, and many human activities.