The inner breakwater is 'sketchy'you might catch the odd one or two.
Personally,I give it a miss these days.
You can actually fish off the bridge at 4 mile bridge,or from the small boat launch ramp.
Two older locals were fishing there a couple of years ago,they were catching small baitfish off the Holyhead side of the bridge,then using live baitfish under a float on the Rhosnigr side.( bigger hooks)They caught a few bass.
The rays come up the chanal from the rhosniegre side,probably better fished for from the boatlaunch.
I usually park near the shops about 100yds from the bridge,(easy walk)
There's a deep hole where the tide rushes through on the bridge.
Probably more comfortable for a young lady this time of the year.
Rhosneigr can fish well,down the main st to the beach and turn right.
There are sandbanks that can fish well.The small stream that comes in there is a breeding ground for flatties.
Good luck 'V'