Musky Hunter Moon Phases are based on the fact that the moon influences the behavior of all creatures, including muskies. Periods of full moon and new moon are considered the best for big muskies. Moonrise and Moonset are key factors, as are the times of Moon overhead and Moon underfoot. Moon overhead is the time when the moon is at its zenith between rise and set. Moon underfoot is the time when the moon is at its nadir between set and rise, and is 180 degrees in its orbital path from its zenith.