Travel somewhere warm and tropical.
Hire a guide. Captain Rick from Swashbuckling Tours - 340.244.8600.
Borrow or rent snorkeling gear.
Borrow spear guns. Make sure safety is always "on" unless shooting.
Build a lobster snare for serendipitous lobster sightings.
Find quiet deep cove with lots of underwater structure.
Watch out for endangered marine life.
Share bounty with friends.