LOL....... Rays a little hungry?
Mine have been fine for years and I'm sure they will continue to be. My rays can't even get to my catfish as there's a giant pile of driftwood in the middle of the tank just for this reason. Shelter for the 2 irwinis, wolf, and the lil striped rapheal that's just fine in there.
IF I was to pull all the driftwood out of my tanks I'd expect significant losses from the rays chewing on fish that can't hide.