Today we saw dolphins very early, but a private US boat was also observing the group. It is a difficult dynamic between private foreign boats & local commercial boats, but things are usually handled quietly & respectfully. We observed the large (18+) group of spotted dolphins & while this other boat was in the area. Once it left, we tried for a swim, but the dolphins were still on the move. Shortly after a second private US boat came into the area, but after a nice radio conversation, they agreed to keep their distance from the animals. So, we continued to observe the group as they headed south. There were a few more water entries, but the final entry around 1920 was by far the most interesting. It was a group of mainly adults, with one calf sneaking a circle swim here & there. But, toward the end of the swim, one adult seemed a bit agitated with sudden movements and S-posture. The dolphins seemed to be swimming away at the same time, but our encounter shifted from interactive to observational. Back on the boat, we enjoyed a nice Bimini sunset before returning to the dock at about 2040. More dolphin trips scheduled for Tuesday & Thursday. Until then, Kel