Visitors look at trout fishes in an aquarium during a press visit of the Aquatis, Europe's largest fresh water aquarium-vivarium, in Lausanne, Switzerland.
Diver Mirko Becker swims with green turtles at the German Oceanographic Museum in Stralsund, Germany. Green turtles are undergoing their annual medical check-up at the museum.
An aqua tunnel at the 'Ozeaneum' museum in Stralsund, Germany. The German Oceanographic Museums are amongst the most popular in Mecklenburg-Western Pomerania.
Children look at sharks swimming at the main tank of the aquarium at the Zoo in Madrid.
An aquarium staff member dressed in a Santa Claus costume interacts with African penguins, wearing red and green holiday garments, perform at the Hakkeijima Sea Paradise aquarium-a...
A diver dressed as Santa Claus feeds fish during the annual Christmas event at Tokyo's Sunshine International Aquarium, in Tokyo.
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