I had a little tiny volitan, about 5" max, in a predator. I had a 5" christmas wrasse in my reef that was killing my clown, so I scooped him and put him in the predator as a temporary measure. I figured he'd be fine as he was agressive enough and the same size as the lion. It took about 30 seconds before the lion had half of the wrasse hanging out of his mouth. Of course he couldn't swallow it, so he spit it out. about five minutes later, he tried again. The second time ended up killing the wrasse. So my vote is no.