Sun coral and Porcupine sea urchin (Diadema setosum)

   Live colonies of the Sun Coral (Tubastraea coccinea) range in color from orange, rose-red, to pink with yellow tentacles. This non-reef-building coral extends beautiful translucent tentacles at night. Adult Diadema setosum sea urchins are typically black, although white specimens are also common. Juveniles have alternating black and white zones on their spines.