I had earlier ventured an opinion that the Sea Serpent sightings by the Captain of the Ambon (Evidently also later aboard the Java) were of a smaller and distinct form of Bernard Heuvelmans' Marine saurian and were the same as the creature which represented by the carcass of "Gambo" on the Atlantic side of Africa. To quote the original article:
I include a map to indicate the carcass and the sightings. I also indicate (tenatively) that there might have been another corpse of this type found off Puerto Rico in 1964 according to information in Ivan Sanderson's files.
Leaving that part aside for now, Jay also sent me the banner at the top of the page comparing the Ambon creature to a Mosasaur and suggesting it was merely a small but conventional Marine Saurian. I thought that was a possibly valid idea and asked to run the comparison on this blog.
BTW, two later amendments to the original article were that the term "Nederlandisch" was decidedly old-fashioned and liable to raise a few eyebrows these days, and that the Puerto Rico 1964 carcass was also possibly a small cetacean.