"I'm pretty the characteristics of this animal match the Thorunna florens group rather than T. australis. T. australis has just a single orange band on the rhinophores while T. florens has two. T. australis has only one white line per side, rather than the two of T. florens--the two on the left side of the animal are most visible in this photo. T. australis gills are more orange-red banded rather than red-tipped, which is typical of T. florens. T. australis also lacks the orange patch on the anterior margin so characteristic of all those we are currently calling Thorunna florens and which is visible only as a red edge to the anterior margin in this frontal view. However, T. florens is so variable that I strongly suspect there are several different species currently being lumped under that name."