So can someone try to describe underwater walking to me?

I obviously have not done it. I love snorkelling, but I also love walking along an ocean shore examine the flora and fauna. So something that combines the two sounds kind of interesting.

Wendy
------
Booked: Uniworld Egypt, 2015
Tauck Amsterdam to Budapest, 2016
Paul Gauguin, Societies & Tuamotus 2016