 Furthermore, morphological data suggests a number of Australian species diverged very recently during the last glacial maximum, which caused land bridges to isolate populations of fish.The two aforementioned species of school whiting, "S. maculata" and "S. burrus", and "S. ciliata" and "S. analis" are all thought to be products of such a process, although only the school whiting have anything other than similar morphology as evidence of this process.The Sillaginidae are medium-sized fishes which grow to an average of around 20 cm and around 100 g, although the largest member of the family, the King George whiting is known to reach 72 cm and 4.8 kg in weight.