Like the ginger said this has often been discussed…
Bait: Prawns (Cooked or raw), Paddle Crab or Crayfish.
Hooks: Does not matter, but around 4/0 in size.
Time: Best targeted in the evenings or after dark, although they can be caught any time of day. Sometimes can have great fishing during the day but its normally slower.
They do not seem to care about dirty water
They can be caught of almost any surf beach.