cockburn sound fishing

i went out today at cbh and got nothing sounder was going off over 2 the sulphur jetty still nothing and bp jetty nothing again

went out last night and picked up 2 crabs near cbh floating in the water  about 1030 pm went to mangles bay found crabs floating driving around we found some big gar fish i was using the prawn light to see it was blinding them i have never seen this before scooped them up with a net 

been out lots of times in cockburn sound through the day never done well can any one tell me of any spots to try as my boat is under powered cant go out long way