Here is one last confusing Parrotfish for me. I was guessing brown variation Redtail. The Humann-Deloach fish book says it is difficult to distinguish the brown variation Redtail IP from the tan variation Yellowtail IP. I don't have good color in the photo which may make it more difficult to identify, but any guesses?
I have added 3 more photos. The second and third are more photos of the first fish. In the second photo there may be the slightest of pink around the pectoral fin.
In the third photo, there is also an IP Stoplight. Here you can clearly see the red of the Stoplight and still no color other than green/grey in the mystery parrot.
The fourth photo is that of a Yellowtail IP I took on the same trip. I included it because I just received a copy of Randall's 1996 Caribbean Reef Fishes and in it, he says the following about IP Yellowtail ..."alternate dark and pale bars (two of each) cross the chin"... My photo of the IP Yellowtail looks almost identical to that of Randall's and in both photos, you can see these "dark and pale bars". I cannot see any bars like this in the mystery parrot but I have no idea if that is significant or not in helping to determine if it is a Yellowtail or a Redtail. Thank you for all the input, I am learning a lot.