There are times when you just have to eat what you get, no matter the trouble
I fed a Silverside to the Anemone in the 45 gallon tank without cutting it in half first. OOOPS....... But he managed to get it down, all but sideways. What a big mouth he has If the Anemone is large like this one. A large Silverside can be fed to it. But if the Anemone is on the smaller side, say around 4 inches, do not feed anything longer then 3/4 inch to it as it will usually spit it out.
I think I can I think I can
All gone but boy am I stuffed. So just in case you forget to chop up the Silverside, be aware that they can eat the whole thing, it will just take time for them to maneuvered it so that it can be swallowed