First time on forum. I have a mature lion fish in my 300 gal FO. Healthy past 21/2 months. Was feeding small silversides. Stopped eating last week although now he will take a small piece in mouth, 15 minutes later after trying to ingest, looks as though he's choking it down?, then spits it out. He looks fine, acts normal except for not eating. Any thoughts why this behavior? Kar19