Oh, poor Squiggly! Something similar happened a long time ago with one of my sister's fish... it was a fantail goldfish. There he was in his tank and on the next morning it had disappeared. We thought it jumped outside the tank but we looked everywhere and never found a thing. We use to say that it was the black hole of the house the one responsible for this. You know the black hole every house has? The one that takes away your pen when you more need it? Or the one sock to make the pair? Maybe that's what happened to Squiggly