I'd recommend Ana Ikan Bakar Petai restaurant if you go to Kuantan and would love to have a seafood dinner. No, petai is not a necessary meal, it's part of the restaurant name.
Greenish
Lala masak pedas featuring Sotong goreng tepung.
Delicious, and it makes you drool every time you think of it. One thing for sure, on weekend night especially you will hardly find empty table. You have to wait until other visitors finish their meal. But it's worth the wait.