I did a search for fishing trips out of Tulum. This trip surfaced with high ratings, and arranged transportation. Upon booking, the "Captain" asked for where I was staying, and then said it is too far for transportation. He then said he would change the trip to a closer location. He then proceeded to say he still could not arrange transportation. I had to book a rental car through my hotel. Once I confirmed I had transportation, the "captain" then said he had a family emergency, and that he could not make the trip, but that he has someone he trusts to ensure I have a great trip. The person who eventually captained the trip was excellent, and he did get us on to some fish, but no where close to the experience we thought we were booking from the advertisement. In further conversation with our guide, he let us know the "captain" runs a booking business, and lives in Guadalajara - clear on the other side of Mexico - and that he is a regular contracted guide for the "captain". If you want to go to Ascension Bay, make sure you confirm the true location, transportation, and who will be your guide before you finalize your booking.