What I have seen so far is the larger ones like mullet.
My biggest was 20kg on half a mullet in the bricks (night).
then a 13kg one on mackerel head on the sand (day)
About 5 of around 5kg on prawn/chokka in the bricks (Day)
I have caught one on strepie.
The 3 or so smaller ones I have caught, have all been on pink prawn while scratching for blue fish (Day).
I have read somewhere they are more active at night?