A new species of electric ray of the genus Torpedo is described from the eastern Gulf of Aden, northwestern Indian Ocean. Torpedo adenensis, n. sp., is placed in the subgenus Torpedo due to the presence of small, knoblike papillae around its spiracles. It is distinguished from all other congeners by its unique dorsal coloration, consisting of a uniform reddish-, rusty-, or orange-brown without any distinctive spots, blotches, or reticulations. A unique combination of characters further distinguishes T. adenensis, including the proximity of the spiracles and eyes, the distance between the second dorsal and caudal fin, which is greater than the distance between the first and second dorsal fins, and the presence of an integumental flap in the clasper glans region. Torpedo adenensis is sexually mature when between 280 and 395 mm in total length, is known from specimens of both sexes, including adults and subadults, and is the only species of Torpedo unequivocally reported from the Gulf of Aden to date.

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The paper is devoted to alien fish species that have appeared in coastal waters of the Black Sea near Crimea for the past 50 years. The fish fauna of the Black Sea mainly comprises species that represent the Ponto-Caspian and Atlantic-Mediterranean faunal complexes. According to the generalised literature data, 158 fish species of 107 genera of 60 families have been recorded in the Black Sea since the publication of K. F. Kessler’s work (Kessler 1877), all of them representing the Atlantic-Mediterranean complex. In waters of Crimea, 116 species of 86 genera of 51 families have been recorded for the same period. A full checklist of fishes of this complex is presented indicating 31 alien species that have appeared since the 1970s and which belong to 27 genera and 16 families. In waters of Crimea, alien fishes make up 26.5 % of all species, 31.0 % of all genera, and 31.4 % of all families of the Atlantic-Medirranean complex. According to the level of their occurrence in marine waters of Crimea, all recently introduced species are grouped into three categories: regular, sporadic, and casual. Their brief characterisics are given, including synonymy, representation in the fish collection of the NMNH NASU, brief description, distribution, and vector of introduction. It was found that benthic species predominate among introduced fishes that occur regularly in waters of Crimea (12 species, or 80.0 %), while bentho-pelagic and pelagic species are less represented (6.7 % and 13.3 %, respectively). Pelagic and bentho-pelagic species prevail (50.0 % and 37.5 %, respectively) among fishes that occur sporadically. Bentho-pelagic species predominate (57.1 %) among fishes that occur casually. It was discovered that among the 31 alien fishes recorded in the Black Sea waters of Crimea for the past 50 years predominate those that have appeared here due to the natural process of mediterranisation (22 species, 71.0 %). It was imposibble to determine the vector of introduction of 4 species (12.9 %). The appearance of 5 species, which represent 16.1 % of all alien species, is related to anthropogenic factors. It can be also concluded that benthic species predominate among the alien fishes (14 species, or 45.2 %), while bentho-pelagic (9 species) and pelagic (8 species) fishes make up 29.0 % and 25.8 %, respectively. Of the 31 introduced fishes, 10 (32.2 %) have naturalised and acclimatised in marine waters of Crimea and have founded independent breeding populations. Among them, representatives of the family Gobiidae notably prevail, followed by the taxonomically close family Oxudercidae, whereas one species belongs to the family Blenniidae. The so-iuy mullet, which is the only representative of the pelagic ecological group, was introduced intentionally.

The current composition of the family Gobiidae Cuvier, 1816 (Actinopterygii) in waters of Ukraine with comments on species distributions. -L. Manilo. -The present paper is devoted to a literature-based retrospective analysis of changes in the species composition of the family Gobiidae of waters of Ukraine since the 1930s. Keys and checklists published earlier cover the fish fauna of separate regions of Ukraine, either only of river basins or of coastal waters of the Black Sea and the Sea of Azov. The first checklist of fishes of Ukraine was published by academician A. M. Nikolsky in 1930 including both freshwater and marine species known in that time. In that work, the family Gobiidae includes 23 species of 7 genera. In the paper by D. A. Tretyakov (1947), 23 species of 10 genera of true gobies are listed for waters of Ukraine with some changes in the species composition. In one of the volumes of the series "Fauna of Ukraine. Fishes" devoted to true gobies (Smirnov 1986), data on 25 species of 11 genera are presented. According to the data by Yu. Movchan (2011), the composition of the family largely expanded comprising 33 species of 13 genera, including 5 marine species that were recorded in that time in coastal waters of the Crimea as well as 1 newly described species from the Chorna River. Later, five more marine species, known earlier only in the Mediterranean Basin, were found in waters of Ukraine, as well as another species in the Sea of Azov. It was established that the current fish fauna of the family Gobiidae of Ukraine includes 38 species of 17 genera, according to the literature and data from the fish collection of the National Museum of Natural History NAS of Ukraine (Kyiv). The geographic range and distribution of each species in waters of Ukraine are presented. The fauna of true gobies of Ukraine is composed of species of the Ponto-Caspian (52.6 %) and Atlantic-Mediterranean (47.4 %) faunal complexes. Endemics (4 species) are highlighted along with recent intruders of the Black Sea that have appeared here since the early 2000s (8 species); the time of appearance for 2 species remains unknown.

A Record of the Ratan Goby, Ponticola ratan (Gobiidae, Perciformes), in the Dneprodzerzhinsk Reservoir (Dnieper River). Manilo L. G., Didenko A. V. -The paper contains new data, which confirms distribition of the ratan goby, Ponticola ratan (Nordmann, 1840), in fresh waters, as well as its diagnosis, description, and brief information on its biology.K e y w o r d s: ratan goby, Dneprodzerzhinsk reservoir, biological characteristics, morphology, distribution.Íàõîäêà áû÷êà-ðàòàíà, Ponticola ratan (Gobiidae, Perciformes), â Äíåïðîäçåðaeèíñêîì âîäîõðàíèëè-ùå (ð. Äíåïð). Ìàíèëî Ë. Ã., Äèäåíêî À. Â. -Ïðèâåäåíû íîâûå äàííûå, ïîäòâåðaeäàþùèå ðàñ-ïðîñòðàíåíèå áû÷êà-ðàòàíà, Ponticola ratan (Nordmann, 1840), â ïðåñíûõ âîäàõ, à òàêaeå åãî äèàãíîç, îïèñàíèå, êðàòêèå ñâåäåíèÿ ïî áèîëîãèè.