I'm not sure about Claremont Jetty, but I do see squid while diving up near Mosmans Restaurant, more so if you are casting towards those lights in the water.

 just go down there and look for fresh squid ink on the jetty. if people are catching them then theres always ink around

Claremont Jetty would have to be one of the most underrated spots in the river. I used to fish there 3-4 times a week around 10 - 15 years ago mostly in spring/summer months. You can catch squid ( weed either side of jetty ) black bream ( underneath jetty ), big herring ( casting towards yacht club ), flathead ( lures in shallows or running sinker/whitebait on the bottom out in front ) tailor ( casting towards pt walter with said whitebait rig with a slow retrieve ) yellowfin whiting ( caught my biggest river whiting at 36cm there ) and mulloway ( caught my first river mulloway on a dead fresh trumpeter casting out in the channel ). 2 things you need to know, seabreeze ( sw ) is a bitch in summer and get there early to claim your spot, VERY popular with certain crabbers :-) good luck! 

 and now its up there as being the most croweded jetty during the week and weekends

yep..lots of undersized crabs being caught there in summer

 one of my favourite jettys to fish from in the river . u get everything there

there one afternoon a long long time ago

i usually head towards claremont jetty in the summer times to catch chopper taylor and flatheads. if you want a spot in the summer time you definitely have to go early.

 thanks guys