If you are feeling that adventurous,and fancy Rhosneigr,I know a spot.
If you head for the beach from the main crossroads in Rhosneigr,then turn right at the beach
go past the little head towards the sandhills,there is a little river that runs thro from Valley.
When the tide is out,it leaves a sandbar.when the tide is coming in,it covers the sandbar.
I have walked up the river from the sea (in the summer)only 200yds at the most.
There were loads of young flatties flying in all directions,and of course,where there are flatties,
there are predators coming in over the sandbar.
The other place is to fish off the bridge at 4 mile bridge,when the tide is coming in the outlet
on the Rhosneigr side,the bass follow it in.
I watched two old locals float fishing that side last year,they were pulling tiddlers out on the other side of the bridge next to the wall,then putting the tiddlers on under the float on the other side.They had 4 or 5 bass.
There's a slipway next to the bridge if you fancy beach fishing,dead easy access.
If you go over the bridge,there is a little shop on the right where you can park.
Certainly an interesting spot,if nothing else.
Tight lines.