juvenile red radiant sea urchin laying on the bottom and looking around, a tropical animal with spines from the pacific ocean

and animal animals aquarium around astropyga baby blue bluespotted bottom brown closeup diadematidae diadematoida exotic eye false fire from hedgehog indo indopacific juvenile juveniles laying life looking marine ocean orange pacific pet pets prickles prickly quills radiant radiata red sea spine spined spines spots spotted tropical underwater urchin urchins water wildlife yellow young youngling