Although the two illustrated books are relatively close to say that this is luzon starfish, then call it Luzon starfish. The mind stiffened, and there was no better name.

Taken on February 2, 2020, off ambon Island, Indonesia
The complete catalogue of marine fish and creatures in the sea gives the name Luzon thorn starfish, while the English name of Reef Creatuer Identification is Luzon sea star, which translates to Luzon island starfish. And I have my own classification of starfish, divided into starfish categories, so I call Luzon here to refer to starfish.
Luzon refers to the starfish scientific name Echinaster luzonicus,
Features: wrist thin, finger-shaped, the number of 4-7. The length of the wrist is very inconsistent, almost every specimen is different....
Write about it! So I only take pictures and collect them, and I don't describe the creatures in too much detail.
-END-
Disclaimer: Copyright photos, infringement will be investigated.