There appears to be two spieces:
Both the Mulloway and Dagga seem to be the "Argyrosomus japonicus" from what I have read.
Although the Argyrosomus hololepidotus is found along the South African, Madagascan and East African Shore lines. It is more commonly found in shallow water and is listed as endangered.
Prahaps that is why shore anglers have a restriction on Dagga on our coast?
Let me know your thoughts ...just add a comment below.