Astropyga magnifica is not the primary subject of the video clip; the primary subject is Ethusa sp. (Carrier crab). Indo-Pacific, Shot at dusk, Duration 25 seconds
Diadema savignyi is not the primary subject of the video clip; the primary subject is Ostorhinchus hoevenii (Frostfin cardinalfish). Indo-Pacific, Schooling, Duration 19 seconds