Sinking slowly through Belize's turquoise sea, Giovanni Gonzalez has murder on his mind. The dive guide scans the reef, his dreadlocks moving like a sea creature. I see only the usual confetti of tropical fish, but I can tell that Gio has spotted a lionfish tucked into the coral.
He readies his spear, takes aim and fires. The impaled fish materializes in a cloud of silt, thrashing to free itself - or at least sink a poison-barbed fin into someone's skin. No fool, Gio pulls out a pair of scissors and disarms the fish by snipping off its spiky fins. A squeamish vegetarian, I turn away and watch the fins drift like feathers toward the ocean floor.