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A group of resident bottlenose dolphins (Tursiops truncatus) travel through the Moray Firth, Scotland. Natural nick marks can be seen on one dorsal fin, these marks are used for photographic identification by marine biologists.

Diver observing soft corals growing on the remains of a cargo container. Shark and Yolanda, Sharm El Sheikh, South Sinai, Red Sea, Egypt.

Yellow Sweeper (Parapriacanthus ransonneti) Live by day in dense groups and moving into open water to feed on plankton at night.Red Sea.

Cathedral Basilica of St. Mark and Campanile, St. Mark's Square, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Humpback Whale (Megaptera novaeangliae) fluke-up dive (note the Orca tooth rake marks on the right side of the tail) in Icy Strait, Southeast Alaska, USA.

Mountain coral (Porites lutea) with diver exiting the water at the surface. Ras Umm Sid, Sharm El Sheikh, South Sinai, Red Sea, Egypt.

Green Sea Turtle (Chelonia mydas) near to the surface. Machalilla National Park, Ecuador. Pacific Ocean, Ecuador

Research diver approaching manta birostris to record detail in research program, Project Elasmo. Pacific Ocean, Ecuador

As the time to change gets nearer, the caterpillar begins to move more and more, sometimes shaking vigorously. The skin begins to split and the caterpillar sheds its skin in a concertina motion. . Isle of White, UK. Isle of White, UK

As the caterpillars grow, they leave their silk protection and continue feeding until they are large and mature enough to seek somewhere safe to change into chrysalis.. Isle of White, UK. Isle of White, UK

Adult Sperm Whale bull (Physeter macrocephalus) surfacing (note tooth rake marks on melon) in the upper Gulf of California (Sea of Cortez), Mexico.

Spanish Dancer (Hexabranchus sanguineus) Spectacular and largest of the nudibranchs (naked gills) and are reported to reach up to 50 cms in length. Nocturnal. Red Sea.