Suggestions for other possible correlations:

1. Population boom-bust cycles of lemmings.

2. Migration of monarch butterflies.

3. Emergence of 17-year locusts.

4. Toilet flushes at halftime on Super Bowl Sunday.

The mass redistributions caused by these events would be miniscule compared with the water moved around annually by the monsoon cycle, much as Pluto's tidal effect is miniscule compared with that of Venus, which in turn is miniscule compared with the variation in the magnitude of the Moon's component.