I spy my first giant clam, sitting on the sea bed not far below, looking like a big clutch purse with fuzzy iridescent blue lips.
For those who travel to see places rather than sit on ships, cruising is getting ever more interesting.
Busy Phuket is nearby but Koh Yao Yai moves to a different, more laidback rhythm.
It's every bit like the movie version and you really must see the South Pacific from the deck of the sublime Crystal Symphony.
Space and service are primary luxuries of cruising aboard Seven Seas Explorer, but there's much, much more.
The legendary island paradise passes the authenticity test with flying colours - make that azure.
It's unapologetically all-Scandinavian and, just like the Scandinavians themselves, utterly un-ostentatious.
It's an industry first and being referred to as a "Triple Crown" event.
A couple were recently caught on camera trying to flag down their cruise ship as it departed without them.
The sign says "party cruise" though it's not the sort of party you'd expect.
The regulations that apply to ships are determined by the country where they are registered.
An incomparable heavenly vista, geysers and the Hobbit's "movie habitat" await on a cruise that lets the locals tell you their stories.