1. Glyptothorax siangensis, a New Species of Catfish (Sisoridae) from the Brahmaputra River Drainage, Arunachal Pradesh, India

   • P. Singh
   • L. Kosygin
   • S. D. Gurumayum

   OriginalPaper 19 October 2023 Pages: 993 - 1004

   

2. Redescription of the Сommon but Poorly Known Piranha Dulce Serrasalmus hollandi (Serrasalmidae) from the Upper Madeira River

   • F. Gallo-Cardozo
   • M. Careaga
   • F. M. Carvajal-Vallejos

   OriginalPaper 19 October 2023 Pages: 1005 - 1024

   

3. Morphometric Analyses of the Angular Roughshark, Oxynotus centrina (Oxynotidae), with Biological Notes on Specimens from the Sea of Marmara

   • H. Kabasakal
   • U. Uzer
   • F. S. Karakulak

   OriginalPaper 19 October 2023 Pages: 1025 - 1036

   

4. Some Data on Morphology of Antlered Sculpin Enophrys diceraus (Cottidae) from Taui Bay, Sea of Okhotsk

   • E. A. Poezzhalova-Chegodaeva

   OriginalPaper 14 December 2023 Pages: 1037 - 1044

   

5. Dynamics of Diversity of Spined Loaches of Genus Cobitis (Cobitidae) of Trans-Caucasus in the Anthropogenic Period According to the Data of Museum Collections. II. Morphokaryological Variation, Taxonomic Status, and Diagnostic Characteristics of Adjaran Spined Loaches

   • E. D. Vasil’eva
   • V. P. Vasil’ev

   OriginalPaper 14 December 2023 Pages: 1045 - 1061

   

6. New Morphological and Molecular Data on the Southern Ninespine Stickleback, Pungitius platygaster (Gasterosteidae) from Southern Caspian Sea Basin

   • H. R. Esmaeili
   • G. Sayyadzadeh
   • K. Abbasi

   OriginalPaper 19 October 2023 Pages: 1062 - 1071

   

7. Morphological Identification and DNA Barcoding Confirm the Discovery of Ambassis dussumieri (Ambassidae) in the Persian Gulf

   • M. Afrand
   • I. Sourinejad

   OriginalPaper 19 October 2023 Pages: 1072 - 1079

   

8. European River Lamprey Lampetra fluviatilis (Petromyzontidae) of the Pskov Lakeland: Current State of Isolated Populations

   • A. O. Zvezdin
   • A. V. Kucheryavyy
   • D. S. Pavlov

   OriginalPaper Open access 14 December 2023 Pages: 1080 - 1091

   

9. Distribution, Ecology and Size Composition of the White-Blotched Skate Bathyraja maculata (Arhynchobatidae) in the Northeastern Sea of Okhotsk during the Hydrological Summer

   • Yu. K. Kurbanov
   • A. V. Vinogradskaya

   OriginalPaper 14 December 2023 Pages: 1092 - 1101

   

10. Peculiarities of Early Ontogeny of Dwarf Forms of Arctic Charr Salvelinus alpinus Сomplex (Salmonidae) from Lakes Tokko and Bol’shoe Leprindo (Transbaikalia). 1. Pure Forms

    • M. Yu. Pichugin
    • N. B. Korostelev
    • S. S. Alekseyev

    OriginalPaper 14 December 2023 Pages: 1102 - 1129

    

11. On Widening the Hybrid Zone for Chars of Genus Salvelinus, Kundscha S. leucomaenis and Northern Dolly Varden S. malma (Salmonidae), in Rivers of Kamchatka Peninsula

    • K. V. Kuzishchin
    • M. A. Gruzdeva
    • A. V. Semenova

    OriginalPaper 14 December 2023 Pages: 1130 - 1148

    

12. Genetic Evaluation of the Refuge Program for Sonoyta Pupfish Cyprinodon eremus (Cyprinodontidae) in Mexico

    • R. Rodríguez-Ramírez
    • A. A. Echelle
    • M. A. López-Torres

    OriginalPaper 19 October 2023 Pages: 1149 - 1156

    

13. Trematode Diplostomum pseudospathaceum (Diplostomidae) Larvae Penetrate the Underyearlings of Oncorhynchus mykiss (Salmonidae) and Manipulate Their Behavior

    • V. N. Mikheev

    OriginalPaper 14 December 2023 Pages: 1157 - 1162

    

14. Role of Thyroid Hormones in Adaptation to Volcanic Contamination of Freshwater Habitats in Charr of the Genus Salvelinus (Salmonidae)

    • E. V. Esin
    • E. V. Shulgina
    • D. V. Zlenko

    OriginalPaper 14 December 2023 Pages: 1163 - 1171

    

15. Chronic Starvation-Induced Alterations in Biochemical Parameters and Hypothalamic-Pituitary-Testicular Axis in the Mozambique Tilapia Oreochromis mossambicus (Cichlidae)

    • M. Gouda
    • C. B. Ganesh

    OriginalPaper 19 October 2023 Pages: 1172 - 1187

    

16. Influence of Hypothyroidism on the Variability of Carotenoid Coloration in Amatitlania nigrofasciata Females (Cichlidae)

    • D. V. Prazdnikov

    OriginalPaper 14 December 2023 Pages: 1188 - 1194

    

17. Morphological Сharacterization of the Spinal Cord Regeneration in Adult Desert Killifish Aphaniops hormuzensis (Aphaniidae)

    • M. Motamedi
    • A. R. Soltani
    • A. Teimori

    OriginalPaper 19 October 2023 Pages: 1195 - 1202

    

18. Morphological Deformities in Stingrays (Dasyatidae) from the Rameswaram Island, South India

    • M. Yosuva
    • D. Jeyapragash
    • N. Rajendran

    SHORT COMMUNICATIONS 19 October 2023 Pages: 1203 - 1208

    

19. New Data on Biology of Siberian Stone Loach Barbatula toni (Nemacheilidae) in Langeri River (Sakhalin)

    • E. A. Kirillova
    • P. I. Kirillov

    SHORT COMMUNICATIONS 14 December 2023 Pages: 1209 - 1212

    

20. Notes on Hermaphroditism in the Baltic Herring Clupea harengus membras (Clupeidae) in the Gulf of Finland

    • A. F. Kuznetsov

    SHORT COMMUNICATIONS 14 December 2023 Pages: 1213 - 1217