A Review of Sculpins (COTTOIDEI) of Middle Asia with a Revalidation of the Species Cottus jaxartensis and Description of a New Species Cottus nudus sp. nova V. G. Sideleva OriginalPaper Open access 23 June 2021 Pages: 327 - 338
Taxonomic Status of Four Rare Alien Fish Species of the Kapchagay Reservoir (Balkhash Basin, Central Asia) N. Sh. MamilovT. G. KonysbaevE. D. Vasil’eva OriginalPaper Open access 23 June 2021 Pages: 339 - 347
Atypical Structure of Olfactory Organ in Moon Wrasse Thalassoma lunare and Sixbar Wrasse T. hardwicke (Labridae) N. I. PashchenkoA. O. KasumyanL. T. K. Oanh OriginalPaper 23 June 2021 Pages: 348 - 360
Overview of the Composition and Spatial Distribtion of the Communities of Deep-Water Pelagic Fish in the Tropical Waters of the Mid-Atlantic Ridge in the Russian Exploration Area S. G. KobylianskyA. V. MishinA. N. Kotlyar OriginalPaper 23 June 2021 Pages: 361 - 385
First DNA Barcoding-based Inventory of Suez Gulf Fishes in Egypt and its Implication for Species Diversity E. M. AbbasM. IsmailF. S. Ali OriginalPaper 23 June 2021 Pages: 386 - 395
Finding of Arcrtic Charr Salvelinus alpinus (Salmonidae) and Sculpin Cottus cf. poecilopus (Cottidae) in the Verkhnyaya Angara basin Near the Divide with the Lena River System: New Data About the Invasion Routes of the Representatives of Lena Ichthyofauna Into Baikal Basin S. S. AlekseyevV. P. SamusenokA. L. Yur’ev OriginalPaper 23 June 2021 Pages: 396 - 406
Variability of Morphobiological Characteristics of the Pacific Herring Clupea pallasii from Arctic and Pacific Populations A. N. StroganovA. V. SemenovaA. A. Smirnov OriginalPaper 23 June 2021 Pages: 407 - 417
Isolated Fluvial Population of Dolly Varden Salvelinus malma on Bering Island (Commander Islands) A. M. MalyutinaK. V. KuzishchinM. A. Gruzdeva OriginalPaper 23 June 2021 Pages: 418 - 432
Population Status of Two Wedgefish Species in Western Indonesian Inner Waters, Inferred from Demographic Models with Limited Data W. KurniawanS. OktaviyaniFahmi OriginalPaper 23 June 2021 Pages: 433 - 451
Precision of Age Estimates Obtained from Five Calcified Structure for Wels Catfish, Silurus glanis R. YaziciM. YilmazO. Yazicioğlu OriginalPaper 23 June 2021 Pages: 452 - 459
Reproductive Biology of the Endemic Fish Etroplus suratensis (Cichlidae) from a Tropical Estuary in Southern India K. RoshniC. R. RenjithkumarB. M. Kurup OriginalPaper 23 June 2021 Pages: 460 - 466
Spermatogenic Ultrastructure of the Grunting Toadfish Allenbatrachus grunniens (Batrachoididae) N. SukkheeT. MitparianJ. Kettratad OriginalPaper 23 June 2021 Pages: 467 - 475
Agonistic Behavior of Young Perch Perca fluviatilis: The Effects of Fish Size and Macroparasite Load V. M. SlivkoA. E. ZhokhovV. N. Mikheev OriginalPaper 23 June 2021 Pages: 476 - 481
New Data on Morphology, Distribution, and Ecology of the Tentacled Lumpsucker Cyclopsis tentacularis (Cyclopteridae) in the Sea of Okhotsk P. A. SavelievV. N. TuponogovM. I. Boiko SHORT COMMUNICATION 23 June 2021 Pages: 482 - 486
