keep your eyes peeled for bird activity - the gulf is fairly expansive and seeing a bunch of birds diving is worth diverting your course to troll by. certain fish, like tuna and mahimahi are often, if not always, given away by birds. there's nothing more exciting than anticipating a big strike!
fishing is a great thing to be interested in, as it can never be fully satiated, a real fisherman always wants to catch a bigger fish, and if he's caught the biggest already, then he starts trying to do it on lighter tackle or using more skilful means! and fishing is intricately linked to boating, so if your son continues to be into fishing, he'll be boating with you for a while yet!