I just watched as Fred managed to wedge himself into his little pagoda ornament. I saw him swim through it today and I didn't realize he could get himself inside of it. The opening is big enough to swim through but not much bigger. He managed it somehow though and promptly wiggled his way out when I came to look.
It does make me wonder if that's how he tore his top fin. Silly boy. At least he is not obsessively glass surfing today. He still does a bit but he spent much more time exploring the tank today instead and he ate too.