I have been here for 5 days and my observation has been that the visibility is a lot less than I am used to seeing (No pun intended...). I am guessing that is why we haven't seen the usual larger critters, with the exception of a Bull shark at Punta Sur. I did see a couple of Spotted Rays today flying by very close at Palancar Caves. I have also noticed a lot of up-currents with sargassum mixed in.