The PBS article that I cited above caught my eye because I may have helped contribute to the start of this problem when I was stationed on Okinawa back in the mid-Eighties. I helped a friend and fellow diver with an import license collect these lethal little beauties for sale to tropical fish dealers in the US. We would hunt them at night by herding them, one at a time, into a mesh specimen bag and then transferring them to a larger holding bag, being extremely careful to avoid their neurotoxin-equipped spines. They are very exotic looking, thanks to their defensive spines and external gill clouds, so there was a steady demand for them by stateside aquariums and exotic fish collectors. We could make a hundred dollars capturing a couple dozen of them over the course of a few nights every couple of weeks, which nicely supplemented our paychecks.