Diving (snorkeling,etc) fresh water

I have some what a kinship with Roger Deakin,(below video) author of "  Waterlog ", I'd since 8 or 9 years old swim snorkel in every creek,pond,river,lake I could. Often nude if could, I have a love to see the life below the surface, at age 18 learned to scuba dive, thus start doing that as often as could.