The trouble is that you don't know which of the zoas have them and which don't. How much are you willing to gamble? And you dont' need to wear bulky gloves just powder free thin latex disposable ones. I know when I messed with my first colony without gloves (before I knew better) I ended up with a metallic taste in my mouth for over a day (since learned this happens to a lot without gloves). I didn't have any open wounds on my hands so it didn't enter through those. I obviously didn't die but I'll wear the gloves and not have that funky taste in my mouth again.