Green sea turtle (Chelonia mydas), feeding on the sand near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Green sea turtle (Chelonia mydas), feeding on the sand near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Small group of fish swimming over sandy sea bed. Bonaire. (RR)

Sand eel (Hyperoplus lanceolatus) resting on the sea bed. UK.

Bottlenose dolphin (Tursiops truncatus). Underwater crater, feeding on sandy bottom. Bahamas.

Stripy Cuttlefish on sandy sea bed Sepia officinalis, Jersey, British Isles

Boy sitting on a lounger on the beach, Caorle, Veneto, Italy

Banded Bubble Starfish or Warty Starfish (Echinaster callosus), Sabang Beach, Puerto Galera, Mindoro, Philippines, South China Sea

Chocolate Chip Starfish (Protoreaster nodosus) gathered on a sandy ground, Sabang Beach, Puerto Galera, Mindoro, Philippines, South China Sea

Gathering of Knobby Star Starfish (Pentaceraster cumingi) on sandy ground in front of a reef, Cousin Rock, UNESCO World Heritage Site, Galapagos archipelago, Ecuador, Pacific Ocean

Gathering of Knobby Star Starfish (Pentaceraster cumingi) on sandy ground in front of a reef, Cousin Rock, UNESCO World Heritage Site, Galapagos archipelago, Ecuador, Pacific Ocean

False Killer Whale (Pseudorca crassidens), swimming above sandy sea bed, Subic Bay, Luzon, Philippines, South China Sea, Pacific

Geometric Moray (Gymnothorax griseus), also spotted moray eel, three, patch reef with soft corals (Xenia) and various stony corals, sandy bottom, seagrass bed, Red Sea, Aqaba, Kingdom of Jordan

Beach of Marina di Campo, Elba, Tuscany, Italy, Mediterranean, Europe