Since the fishing on Mexico's Caribbean coast is close to shore, we can be flexible and meet your needs. Fish as much as you want, and plan breaks if you choose. Stop for snorkeling on a reef along the way. There are good beach front restaurants at Akumal. Take your family out for half the day, drop them off at lunch, and fish without them for the rest.
Sight see along the way.
See sea turtles and dolphins. In the spring, maybe even a whale shark. View the famous cliff side Mayan ruins at Tulum and the smaller Mayan ruins scattered along the coast.