The escrow officer who handles most of my sellers' real estate transactions often goes to exotic places to SCUBA, and I have always been in awe of her ability to do that. It's not quite the same thing when you're watching fish on television, even if the cats seem to enjoy the action, as when you're under the sea and witnessing colors of tropical beauties in person. Which I can't do.
I also have never learned how to snorkel. Wasn't in the lineup of things that I can do well, sorta like water skiing, so I avoided it like no tomorrow. You can read more about my adventures and see photos of Vanuatu in You're Never Too Old to Learn to Snorkel in Vanuatu.