I took the bus to its last stop in the hotel zone, the Westin Cancún, walked a mile or so to the Nizúc Bridge, then after crossing the bridge followed the path to the left through the mangroves along shore to the isolated Restaurante Rio Nizúc. There is no power, the chairs are plastic, and the freshly caught fish is cooked over open flame. Buy a beer and maybe they'll let you fish off the dock there where it is easy pickings. If there is one thing I have learned, it is that low pressure spots mean good fishing. You can catch barracuda, grouper, or yellowtail snapper. Use a spoon or swimbait, and fluorocarbon leader.
Yellowtail snapper I caught with a blue and silver Kastmaster spoon
You can fish off the boardwalk next to the bridge, but I had no luck at this high pressure hole, only chasing barracuda
Surfcasting at the hotel beach with an Ugly Stik 4 piece pack rod. Luckily it didn't get stolen, like my camera did by Mexican baggage handling.
We went looking for a geocache named Crocodile Rock. It is hidden along the shore of Nichupte Lagoon which is home to crocodiles. We did not see any.
Found and signed the geocache
The pirate ship dinner show we went on is next to the Calinda Bridge which is another popular fishing spot