“Diver and shark move with equal agility and elegance, blending into one world. No longer merely observing from the outside – goosebumps are guaranteed!” it promises.

And Mr Cove himself says that the scooter “blends perfectly into the underwater world, and even the sensitive sharks aren't irritated by them”. 

If you’re planning a trip, Stuart Cove’s two-tank dives cost from US $134-170 and Seabob rental adds $54 – plus the cost of the required private instructor/guide, $193. Minimum age is 16 and a PADI Seabob speciality course is, inevitably, on the way.