Hi Kerala Angler,
1. When you enter kollam take the right after the bridge which leads you to this place Neendakara which is good for groupers and small travellys on sabiki setup.
Be aware the groupers there are huge and hand lining on full sardines are advisable.
2. After kollam towards attingal on the NH you have to take a detour right 5 kms from kottiyam ask for the place PARAVUR KAVALA, this is a small canal/sea mouth. Here you could do plugging, baiting for snappers, barras and medium sized travellys.
All the best and keep the forum posted.