I'm not sure how accurate the sign is, but looking at my photos from my August 8th visit, the sign does say Weber's Sailfin Lizard (Hydrosaurus weberi).
@Rizz Carlton I just copied the information from board, but you are right, the dark color head seems like hydrosaurus microlophus. But I have no knowledge on this.
@DannySG this is why I'm not always 100% followed anything in the sign lol, especially due to my experience here in Indonesian facilities.
The hydrosaurus shown here is most likely h. microlophus with the darker head and tan body, h. weberi are more greener and smaller in size. Most of the h. microlophus and h. celebensis are signed here as either h. weberi or h. amboinensis (These two actually rather uncommon in Indonesian facilities, suprisingly), so I guess the same things might occur in other SEA facilities like this one.
