Thank you to CAPT Fred Remen, USCGR for contributing this great old image from the Florida State Archives.
Terminal Island looks complete on the left hand side where the causeway curves but Causeway Island above it, to become Coast Guard Base Miami Beach, is split into a small round island separated from a linear fill island that came from dredging a channel.
It is very interesting to see the number of ships docked around the perimeter of Fisher Island and anchored offshore too.