Scientific name: Astropecten armatus
Taxonomy: Kingdom Animalia → Phylum Echinodermata → Subphylum Asterozoa → Class Asteroidea → Subclass Ambuloasteroidea → Infraclass Neoasteroidea → Superorder Valvatacea → Order Paxillosida → Family Astropectinidae → Genus Astropecten
Locations: Eastern Pacific
Group: Marine Life → Invertebrates → Sea Stars
These bury themselves under the sand during the day.
Even at night, in bright light they'll hide over the course of a minute or two: