New grenadier Coelorinchus ganymedes sp. nova from the Waters of Polynesia (Macrouridae) A. M. Prokofiev OriginalPaper 30 April 2021 Pages: 175 - 181
Juvenile Individuals of Opahs (Lampridae) from the Atlantic and Pacific Oceans. Notes on the Systematics and Distribution of Opahs, Including the Description of a New Subgenus, Paralampris subgen. nov. E. I. Kukuev OriginalPaper Open access 30 April 2021 Pages: 182 - 189
A New Potential Invader: First Record of the Pirambeba Serrasalmus geryi (Characiformes: Serrasalmidae) in the upper Paraná River floodplain, Brazil G. C. DepráA. G. OliveiraR. R. Ota OriginalPaper 30 April 2021 Pages: 190 - 195
Life History of Mediterranean Horse Mackerel Trachurus mediterraneus (Carangidae) from Crimea (Black Sea) D. N. Kutsyn OriginalPaper 30 April 2021 Pages: 196 - 205
Distribution and Biological Features of Grayling Thymallus thymallus (Thymallidae) in the European North-East of Russia V. I. PonomarevA. B. Zakharov OriginalPaper 30 April 2021 Pages: 206 - 219
Distribution, Size and Sex Composition of Gymnocanthus pistilliger (Cottidae) off the Western Coast of Kamchatka in the Summer Period and Modern State of its Resources A. A. MatveevA. A. BalanovV. V. Panchenko OriginalPaper 30 April 2021 Pages: 220 - 229
Age, Growth and Maturity of Red Porgy Pagrus pagrus (Sparidae) from Southeastern Brazil P. A. S. CostaA. C. BragaR. R. B. São-Clemente OriginalPaper 30 April 2021 Pages: 230 - 242
Feeding of the Fish of the Seamounts of the Walvis Ridge (Southeastern Atlantic Ocean). 1. Rosefish Helicolenus mouchezi, Pelagic Armourhead Pentaceros richardsoni, and the Cape Bonnetmouth Emmelichthys nitidus on the Valdivia Seamount A. V. Gushchin OriginalPaper 30 April 2021 Pages: 243 - 249
Population Genetic Structure of Pacific Herring Clupea pallasii in the Northwestern Pacific Ocean Based on Microsatellite Analysis D. S. KurnosovS. Yu. Orlova OriginalPaper 30 April 2021 Pages: 250 - 258
Distribution of Ichthyoplankton in Relation to Specifics of Hydrological Regime off the Crimean coast (the Black Sea) in the Spring–Summer Season 2017 T. N. KlimovaA. A. SubbotinO. A. Garbazei OriginalPaper 30 April 2021 Pages: 259 - 269
Implications of Physical Barriers on Longitudinal Connectivity in the Ganga River System through Morphological Assessment of Cirrhinus mrigala (Cyprinidae) Populations A. K. Dwivedi OriginalPaper 30 April 2021 Pages: 270 - 279
Effect of Hydrometeorological Conditions on Dynamics of Catches (Abundance) of the Primorye Pink Salmon Oncorhynchus gorbusha Based on Retrospective Data (Sea of Japan, Strait of Tartary) A. V. LysenkoT. A. ShatilinaL. A. Gayko OriginalPaper 30 April 2021 Pages: 280 - 292
Electric Discharges in African Upside-Down Catfishes Synodontis (Mochokidae, Siluriformes): Peculiarities and Mechanisms of Electrogeneration V. D. BaronA. A. Orlov OriginalPaper 30 April 2021 Pages: 293 - 298
Tissue Peculiarities of Energy Metabolism Enzyme Activity and ATP Content In Black Sea Ruff Scorpaena porcus (Scorpaenidae) A. A. SoldatovI. V. GolovinaE. S. Kladchenko OriginalPaper 30 April 2021 Pages: 299 - 306
A Description of the Lanternfish larva Lampanyctus indicus (Pisces: Myctophidae) from the Western Indian Ocean Ya. Yu. Bolshakova SHORT COMMUNICATION 30 April 2021 Pages: 307 - 309
First Capture of European Flounder Platichthys flesus (Pleuronectidae) in the Southwestern Part of the Kara Sea G. V. FuksYu. V. Goncharov SHORT COMMUNICATION 30 April 2021 Pages: 310 - 313
Records of the Light Dusky Rockfish Sebastes variabilis (Pallas) (Scorpaeniformes: Sebastiidae) and Lesser Prickleback Alectridium aurantiacum (Perciformes: Stichaeidae) in the Western Bering Sea P. A. SavelievA. B. Savin SHORT COMMUNICATION 30 April 2021 Pages: 314 - 318
Second Finding of a Rare Species Plectranthias klausewitzi (Serranidae) from the Red Sea A. M. Prokofiev SHORT COMMUNICATION 30 April 2021 Pages: 319 - 322
Similarity of Karyotype Structure in Three Mormyrus Species (Mormyridae) from the White Nile and Omo River Tributaries (Ethiopia) S. A. SimanovskyD. A. MedvedevA. S. Golubtsov SHORT COMMUNICATION 30 April 2021 Pages: 323 - 326