(© Carlita Sari) Of Antonín Dvořák’s ten operas, “Rusalka,” written around the dawn of the twentieth century and only a few years before the composer’s death, became his most successful. That this highly romantic fairytale (or should one say, water nymph tale?) should be the most courageous of Opera Australia’s (OA) offerings for the second half of this year, tells {…}