Thanks for coming out with us! We typically spend about half of the tour in the mangrove tunnels and about half of it in the open water. We always modify the tour based on ocean conditions (tides, winds etc) for both your safety and accessibility. Sometimes, there is just not enough water to go through all of the mangrove tunnels. This happens often when low tides and cold fronts happen at the same time--which seems to be the case for your tour. We'd love to have you come out and get more of the mangrove tunnels. Feel free to call the office and get a voucher to use anytime in the future. We love the mangrove tunnels and love to show them off. We apologize if you didn't get enough of them on your tour.