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Abstract:

Based on the performed examination and topographic survey of the underwater karst-abrasion cave Tarzanka on Minor Atlesh (Western Crimea), its morphological description is given for the first time. Features of biology and ecology of inhabitants of this cavity were studied. A new for the Black Sea species of coelenterates – actinia Sagartia elegans (Dalyell, 1848), and a very rare for the Black Sea species of crustaceans – shrimp (Lysmata seticaudata) and mysid (Hemimisis serrata), registered in the Red Data Book of Ukraine, were found in a cave. It was shown that the cave is a permanent habitat for protected species of fishes – goldsinny-wrasse (Ctenolabrus rupestris), Bucchich`s goby (Gobius bucchichi), brown meagre (Sciaena umbra), shore clingfish (Lepadogaster lepadogaster) and crabs - Eriphia verrucosa, Pachygrapsus marmoratus and Pilumnus hirtellus. In a distant tunnel of the cave an interesting group of actinia (Actinia equina) of red colour morphs was found. It is considered that this cave could recently be a place for reproduction of a monk seal that lived in this area (Monachus monachus).