**** happens. I had an agressive pleco. If anyone got in his cave, he'd go after them. Rare accidents can happen. It's a fact about having animals. Turtles are tough and for whatever mysterious reason those turtles didn't try to get the pleco off. Obviously there are factors that isn't known. A healthy turtle won't just sit there if it's in pain. Why the turtle that had it's eyelids munched on, didn't suck his head in is beyond me. If common plecos are often kept w/ turtles like the article says, and the vast majority has lifelong success, I'm not worried. I keep an eye on my turtles. If I see something happening, I'll stop it. So the very rare occuance has 4 or 5 hrs to happen while we sleep. I'll make sure and keep you all updated on how well everyone is doing