I am currently experiencing the same thing...I was given a beautiful beta named Mozart yesterday. A mere 48 hours ago he was swimming around in his resplendent habitat I set up for him. Although I have only been around him a day, I am obviously already very attached. Last night, all seemed normal...To my astonishment, this very morning I woke up and Mozart was nowhere to be found. I have checked everywhere...his abode, my closet, my car, my bed, my house, my purse, the fridge, my shoes, my purse again...I am just so confused. HELP. I am seriously concerned. Do you think someone could steal such an innocent fish?