Do you? I do sometimes, when my husband isn't around :P
This morning I happened to catch eye of my CT who, after being moved from one room to another, destroyed his tail fin. Again.
I stood in front of his tank, crossed my arms and I said "How dare you do that to your fins again! Why would you do that! I am so angry at you." He stared at me defiantly. So I told him "You are a very bad fishy!" and he turned his head away from me and then swam away.
Really? lol So what do YOU talk to your fish about?