Chicoreus nobilis Shikama, 1977
L x W: 49 x 27 mm
~100-110 ft. Dead, crabbed.
17 Feb 2018. Orote Cliffs, Guam.
ID is uncertain. C. paini suggested but would be a considerable range extension. It does not appear to are C. aculeatus; for now treating as a short-spined variation of nobilis.