A coral structure of acropora and platygyra at Eilat‘s Coral Beach Nature Reserve and Conservation area, Red Sea, Israel

Anemones, Sponges and Octocorals, Atlantis bank, in the south-west Indian Ocean

Coral Reef off Key West, Florida, USA

Dead mussels in British Columbia, Canada

Fish swim around a reef at Rongelap Atoll, Marshall Islands, Pacific Ocean

Freshwater Pearl Mussels, River Kerry, Scotland, UK

Japanese Spiky Sea Cucumber (Apostichopus japonicus) on a rock in Peter the Great Gulf, Sea of Japan

Orange Ghost Gobies (Pleurosicya mossambica, a fish), blend in against the bright orange arms of a gorgonian sea fan, by Alex Mustard

Platypus (ornithorynque), Australia

Sea Snail (Micromelo undatus)

Sea cucumber (Peniagone vitrea), bottom of Pacific Ocean

Sea slug (Babakina anadoni), near Melledgan, off the coast of the Isles of Scilly, Cornwall, England, UK