I'd say just about everywhere you see rocks.
Look for spots where you are most likely to loose sinkers, and there you have it.
They also move around a lot with the tide, comming in with the high water and going deeper at low tide, so they can be caught very close to the shore/reef trying to get bits of shellfish that are washed off the rocks as the tide advances.
A small circle hook, size 8-2 with a bit of redbait is the stuff!