I think spear fishing sounds intriguing or using the guns with arrows but it's probably not something I'd spend my vacation time on. I would love to go deep sea fishing though. I have never fished in the ocean before.
I like looking at fish not shooting them or eating them. Do they have those glass bottom boats in Aruba? That would be cool because I never did that or snorkeling before.
I don't believe it is legal to do this. I know it's not with a gun and bullets for sure. I believe the legal law is the same even if you are shooting just arrows.