Saw it a couple days ago. Think it's getting biggerFirst clean your glass:):):):):)... no just kidding. a couple more pictures might help - is it getting better worse - did it just happen overnight - could be an injury? do yo u have more than one clown? I've seen this when clowns (like cichlids) lock mouths - but I honestly dont know what would cause it - but there are far more experts here than I - @Humblefish
