I woke up early this morning to find eggs all over the tank floor which confirmed this is a female ranchu.
But I'm also writing to say the ranchu is kept in a 50 litres QT tank all by itself and it has no trouble releasing the eggs despite the absence of a male ranchu. Hope this proves once and for all that act is possible. It also means my QT tank's water has been good (has 300+ grams of salt.)
It losts a scale, probably as a result of it ramming against the only object in the tank, an air-stone. Sigh.
After changing water, I handspawn her to release the balance eggs still within her to find little are left.
She's doing fine.
Oh, while handspawning, I found her ovary track extruding by 3-4mm; she grew a penis. Perhaps this is a sign of self-spawn?