Yuki, my Crayfish tried to grab it at night while the fish was resting. I'm usually paranoid when I do something drastic such as a major clean up, separating fish for some reason or getting new critters for my tank so I often check on my tank to make sure everything is ok. And my crayfish going after my fish is exactly why I do it, luckily I'm paranoid about that so I caught the little b@st@rd red handed.