Idk, my dogs always LOVED doing weird new shit like this with us. While I never took them scuba diving, they hit stratospheric levels of freakout and tried to come in and rescue us the one time we left them where they could see us (on shore at a public lake) while we waded into the water to dive. They probably would have been psyched to get to come with us after the first few seconds of freak-out.
But they loved trampolines, indoor skydiving, longboarding, diving (as in from a diving board), eating drywall and sneaking into our neighbors houses to try and steal their food.
RIP Pheobe and Godog, you were absolute terrors.