Many of the best snorkeling and underwater photography areas are offshore at coral reefs or around uninhabited islands; you'll have little difficulty in finding a boat to take you out.
You can take a boat to find the best snorkeling areas at coral reefs.
Although the Human Genome Project has been hailed as the single most important, most wondrous map ever produced by humankind, its full scope of societal benefits will not be seen for years to come.