This is Isla Magueyes, the island that once harbored the Mayaguez Zoo but was later turned into the Department of Marine Sciences of the University of Puerto Rico, Mayaguez.
This is solely a graduate department, offering degrees in four disciplines of oceanography. Isla Magueyes is also home to brown Cuban iguanas—pretty much found only on this little island where they are content with human visitors and residents of the island.
To give you a glimpse of these large iguanas, you can take tours from mainland La Parguera that will pass by Isla Magueyes.
You won't usually see them anywhere else in Puerto Rico, thanks to the invasive green iguana seen everywhere.
If you're a visiting scientist or prospective student to the department, you can even stay on Isla Magueyes while conducting research or classes.