Fly size hooks or hooks that are a tad bigger than sprat hooks as flounder dont really have big mouths.

 

Day or night is ok,most of my fishing and spearing is daylight. Really need to daywalk an area first to check out the mud depth as it can be very unfun if you get stuck in soft mud up to your thighs at night.otherwise the only diff is night time you use a torch and the light makes them freeze.

 

Kayaking around in clear water just a little too deep to spear them and casting a bait in front of them is something i have considered but not done yet.

  Next time i might see how those uncooked prawns at countdown go cut into smaller pieces,they look like a small grub.( How to explain to any ranger im not targeting trout may not go to well though,can imagine their faces when i try to expalin im after flounder.)