the seabed at low tide. on the weathered exposed rocks, mespilia globulus is visible

rock boulder wildlife bedrock cliff seabed low tide weathered exposed rocks mespilia globulus spherical sea urchin sharp prickles visible seychelles marine life urchin shape prickle prickly spine globulus biology shallow water seabed bed creature mespilia gray sphere rocks exposed invertebrate tide spines tidal tropical spined shallow stones needle spiny wildlife weathered underwater sea-urchin marine sharp animal cliff granite island seychelles ground detail textured closeup rock surface stone brown background