Added a RBTA to our display about a week ago, since being added it has done great, our percs love it, it's small, about 5" diameter. I came in from the office today and the RBTA has shrunk up to almost nothing, I thought, strange, it doesn't usually do that when the lights are on. Upon closer inspection I see something yellow protruding from it's mouth, a quick look around the tank, no Hippo tang! He was 6". I would have never though an anemone that size could take down a fish that size. Wow, now I just have to explain to my 5 year old why her favorite fish is no longer in the tank.