To get a corbina to bite, light line is needed. Skinny string implies that a limber rod will be used along with a reel that has a very good drag. Sand crabs or fresh mussels are the primary baits. Some corbina will take lures.

Your trout rod and reel will work fine for corbina. I use a 6-6 Berkely Hot Rod rated for 4 - 10 lb. line with a Medium-Light action. I like the Shimano Spirex 2000R spinning reel; the one with the Fightin' Drag. The FD allows me to pre-set the drag for hook-setting, then back it off quickly for fish Fightin'. I fill the spool with 4-lb Maxima and the free spare spool (comes with the Spirex) with 6-lb. I thread the line through a slip sinker (egg or bullet), then tie the line onto a #5 black swivel. I use the #8, pre-snelled Gamakatsu salmon egg hooks. They are painted red and are snelled with clear, 4-lb leader that's just the right length. Tie one onto your swivel. The short shank on these hooks is easier to hide within the bait. You want to completely hide the hook. Sound a lot like trout fishing?