This is purely amazing and cool. Smart people design smart object. Although I’ve known LEGO is a smart toy, I could never imagine to put a real fish inside a ‘Lego Pond’ to swimming like in a tank. The Japanese Temple is a Shrine, named Shishi Odashi, all made with LEGO (I guess some glue added to prevent water leak, too) and it’s made by brilliant designer Gtahelper.
More detail on the following video: