Rodan's blood is like magma, so Gyaos probably isn't trying to eat Rodan, it's probably an attempt to take over his territory. Gyaos has a size advantage.
Until now, he was. Kong is approaching Gyaos's location. High levels of radiation are near Kong, so we can assume either Godzilla is with him, he's bringing his axe or both.
A species of bio-engineered Titan made by an atlantean civilization alongside Titanus Gamera. This creature feeds on the blood of other titans, and are theorized to be made with the DNA of Titanus Rodan. Gyaos is nocturnal, being extremely sensitive to light. Titanus Gyaos is also one of the smartest titans, being able to strategise and prevent itself from being lured into traps. GYAOS; TITANUS GYAOS; BIO-SUPERSONIC; 288 FEET; DESTROYER; WORLDWIDE