DOI: https://doi.org/10.2478/v10058-010-0018-6
Dexamine thea Boeck, 1861 (Amphipoda, Dexaminidae), the rare species never registered in the territorial waters of Ukraine, was first found in Laspi Bay, 40 km of Sevastopol (Crimea, Black Sea). 200 amphipods were examined and described. The pictures showing specific morphological characters are given. Sex and size structure of the community and characteristics of the biotope are discussed.