We did indeed see manatee, birds, "sharks", and an alligator. However, we did not leave the Mariana--ever. We didn't go into the natural habitats and were basically next to a dock the whole time. Jim also did not know very much about the animals. He misidentified many of the birds we saw and dodged questions about the environment. I was very disappointed to have paid $80 to essentially take a trip around the marina, houses and boats insight the entire time.
Instead of learning about the animals and our environment, we basically heard Jim's life story, which if you believe him is: he had 12 horses including a wild mustang, he brought a woman over from the Philippines and she left him once she got her green card, he has 8-9 children, he has a fiancee over in Thailand that he is trying to bring over, Mick Jagger rode on his (little) boat in secret, a Middle Easterner came with his harem and was fed grapes the entire time on his (again, ordinary) boat, he's the only naturalist in the area, and he knew a "nonfiction science fiction" author who had "cancer of the breast" and died. Every time a passenger on the boat mentioned a topic, Jim knew more and one up'ed you. When it was time to get off he said, "I don't want to tell you how much to tip me, but most people do $10 per adult." Also, a personal pet peeve of mine: he kept referring to women as "girls".
Captain Jim is a manipulator that will say anything to get a tip.