Lion fish are highly lethal to humans but here is one in the Italian waters on the day of Brexit. No border controls here!!
Once while scuba diving in Red Sea I had about ten swimming just below me.
These fish are not just beautiful but smart too. They do not attack if you keep respectful distance. Again so much smarter than many human beings who have nasty habits of acting agressively in case they might be attacked for the wrong they have done already.