on the eve of christmas, the madrid zoo has traditionally installed an installation of a biblical scenes happening on for half an hour we observed underwater inhabitants, turtles, and fish. giant groupers and even sharks. we dived to a depth of 4.5 m with a water temperature of 23°. for us it could , of course, be a little warmer, but for sharks it is ideal. according to the staff of the madrid zoo, the tradition of installing a christmas nativity scene at the bottom of the shark tank has been going on for 28 years. a special new year's program was prepared for sharks from the delphine center for oceanography and marine biology in novosibirsk. a diver dressed as santa claus dives to the bottom of an aquarium every day and distributes gifts to its inhabitants. christmas in eco-style, the streets of the argentine city of capiove were decorated with recycled materials for the fifteenth year in a row. local residents collect rags, deodorant balls, and powdered milk bags all year round and turn them into decorative items in december. hundreds of tourists come to kopiova every year to witness