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Animals publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Environmental Influence in Physiological, Endocrine, and Oxidative Stress Responses of Aquatic Invertebrates

edited by Marcelo Hermes-Lima,

Daniel Carneiro Moreira

and Víctor M. Cubillos

submission deadline 15 Oct 2025 | 3 articles | Viewed by 7005 | Submission Open

Keywords: comparative physiology; environmental change; hormesis; hormone; oxidative stress; redox biology

(This special issue belongs to the Section Aquatic Animals)

Feed Additives for Improving the Immunity of Aquatic Animals

edited by Yang Ding and Álvaro Fernández-Montero

submission deadline 29 Oct 2025 | 1 articles | Viewed by 981 | Submission Open

Keywords: functional feeds; prebiotics; probiotics; symbiotics; phytobiotics; essential oils; immunomodulation; fish and shellfish immunology

(This special issue belongs to the Section Aquatic Animals)

Environmental Pollutant Effects on the Physiological and Immune Functions of Aquatic Animals

edited by

Hui Guo

and Liqiang Zhao

submission deadline 31 Oct 2025 | 6 articles | Viewed by 11810 | Submission Open

Keywords: aquatic animals; environmental pollutants; stress response; physiological functions

(This special issue belongs to the Section Aquatic Animals)

Lipid-Based Nanoparticles for Sustainable Aquaculture

edited by

Nopadon Pirarat

Manoj Kamble

and

Seyyed Morteza Hoseini

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1471 | Submission Open

Keywords: aquaculture; plant extracts; bioactive compounds; nanodelivery systems; lipid-based nanoparticles; feed additives; nutrition; disease resistance; mechanisms

(This special issue belongs to the Section Aquatic Animals)

Pharmacokinetics and Pharmacodynamics in Aquatic Animals—2nd Edition

edited by

Jonas A. R. Paschoal

Fabiana Pilarski

and André Gotardo

submission deadline 20 Nov 2025 | Viewed by 215 | Submission Open

Keywords: aquatic organisms; medicines; diet; metabolism profile; contaminants; pesticides; veterinary drugs

(This special issue belongs to the Section Aquatic Animals)

Optimizing Farm-Raised Fish Production: Nutritional Requirements, Precision Feed Formulations, Sustainable Feeding Strategies, and Health and Welfare

edited by

Simon Davies

and Ehab El-Haroun

submission deadline 30 Nov 2025 | 4 articles | Viewed by 5199 | Submission Open

Keywords: fish nutritional requirements; feed formulation; functional feed additives; immuno-nutrition; gene expression; gut integrity; microbiome; disease resistance; welfare

(This special issue belongs to the Section Aquatic Animals)

Oxidative Stress in Aquaculture Organisms: Impact of Environmental Stressors and Nutritional Factors

edited by

José María Monserrat

and

Marcelo Borges Tesser

submission deadline 30 Nov 2025 | 2 articles | Viewed by 2311 | Submission Open

Keywords: chemoprotection; bioactive molecules; precision nutrition; feeds; health; nanotechnology

(This special issue belongs to the Section Aquatic Animals)

Morphological, Immunohistochemical, and Molecular Advances in Fish Skin 3.0

edited by

Mauro Cavallaro

submission deadline 30 Nov 2025 | 1 articles | Viewed by 1251 | Submission Open

Keywords: skin; teleosts; skin appendages; glands; light organs; morphology; ultrastructure; molecular advances

(This special issue belongs to the Section Aquatic Animals)

Recent Research on Shellfish Aquaculture and Reproduction

edited by

Sobhan Akhavan

and Mark Burdass

submission deadline 10 Dec 2025 | 4 articles | Viewed by 6504 | Submission Open

Keywords: shellfish; aquaculture; physiology; selective breeding; innovative farming; sustainability; hatchery production; specific pathogen free; biosecurity

(This special issue belongs to the Section Aquatic Animals)

Sex Determination and Differentiation in Aquatic Animals

edited by

Qiaomu Hu

and

Ke Feng

submission deadline 15 Dec 2025 | 5 articles | Viewed by 5947 | Submission Open

Keywords: aquatic animals; genetics; genomics; epigenetics; sequencing; sex determination; sex differentiation; gene; expression

(This special issue belongs to the Section Aquatic Animals)

Global Fisheries Resources, Fisheries, and Carbon-Sink Fisheries

edited by

Teruhisa Komatsu

Min Xu

and

Zengqiang Yin

submission deadline 15 Dec 2025 | 6 articles | Viewed by 4212 | Submission Open

Keywords: fisheries; habitats; overfishing; fishery resource biology; economic aquatic animal behavior; stock enhancement by releasing; environmental DNA; fisheries management; climate change; ecosystems; ecological models; carbon-sink; aquatic ecological ranches; fisheries products

(This special issue belongs to the Section Aquatic Animals)

The Invasive Blue Crab: Implications for Fisheries, Aquaculture and One Health Perspective

edited by

Giuseppe Esposito

Silvia Colussi

and

Paolo Pastorino

submission deadline 25 Dec 2025 | 2 articles | Viewed by 2734 | Submission Open

Keywords: Callinectes sapidus; animal health; invasive alien species; biodiversity; habitat structures; ecosystem services; animal genetics; environmental pollution

(This special issue belongs to the Section Aquatic Animals)

Changes in Population Characteristics of Marine and Freshwater Organisms and Their Environmental Driving Factors

edited by

Heng Zhang

submission deadline 31 Dec 2025 | 11 articles | Viewed by 13471 | Submission Open

Keywords: population characteristics; spatial– temporal dynamics; biology; environmental factor; climate change; species distribution; eDNA; resource abundance; marine and freshwater organisms

(This special issue belongs to the Section Aquatic Animals)

Novel Insights into Lipid Metabolism in Aquatic Animals

edited by

Xiangfei Li

submission deadline 31 Dec 2025 | 8 articles | Viewed by 12077 | Submission Open

Keywords: lipid homeostasis; fatty acid sensing; lipid metabolism disorder; organelle dysfunction; intestinal microbiota; fish welfare; flesh quality; precise nutrition; nutritional intervention; omics technology

(This special issue belongs to the Section Aquatic Animals)

Enhancing Aquatic Animal Health Through Feed Additives

edited by Lourenço Ramos-Pinto, Marina Machado and

Rita Teodósio

submission deadline 31 Dec 2025 | 7 articles | Viewed by 9877 | Submission Open

Keywords: functional feeds; aquaculture; fish and shrimp health; disease resistance; immune response

(This special issue belongs to the Section Aquatic Animals)

Nutrition and Health of Aquatic Animals

edited by

Jianan Xian

submission deadline 31 Dec 2025 | 1 articles | Viewed by 2390 | Submission Open

Keywords: nutrition; immunity; disease resistance; aquatic animals; feed

(This special issue belongs to the Section Aquatic Animals)

Ecology of Aquatic Crustaceans: Crabs, Shrimps and Lobsters

edited by

Hui Guo

and

Yafei Duan

submission deadline 31 Dec 2025 | 2 articles | Viewed by 1748 | Submission Open

Keywords: crustaceans; environmental stress; eco-physiology; biochemistry; pollutants; healthy aquaculture; adaptive mechanisms

(This special issue belongs to the Section Aquatic Animals)

Fish Reproduction: Molecular Mechanism and Extrinsic Factors Affecting the Gonad Development—Second Edition

edited by

Irfan Ahmad Bhat

and Rupam Sharma

submission deadline 31 Dec 2025 | Viewed by 312 | Submission Open

Keywords: fish; reproduction; gonad; PGC; sex differentiation; HPG axis; hormones; steroids

(This special issue belongs to the Section Aquatic Animals)

Zero Carbon Footprint Aquaculture

edited by Elisa Benini

submission deadline 15 Jan 2026 | Viewed by 102 | Submission Open

Keywords: aquaculture; carbon footprint; zero-carbon future; renewable energy; life cycle assessment (LCA); sustainable feed; integrated multi-trophic aquaculture (IMTA); climate-smart aquaculture

(This special issue belongs to the Section Aquatic Animals)

Recent Progress in the Anatomy and Pathology of Marine Mammals: Second Edition

edited by

Cinzia Centelleghe

and

Jean Marie Graïc

submission deadline 20 Jan 2026 | Viewed by 116 | Submission Open

Keywords: anatomy; pathology; marine mammals; cetacean; dolphin; whale; conservation; one-health

(This special issue belongs to the Section Aquatic Animals)

Advances in Nutrition, Sustainability and Ecology of Salmonids

edited by

Kiranpreet Kaur

submission deadline 30 Jan 2026 | Viewed by 367 | Submission Open

Keywords: salmonidae; nutrition; feed; sustainable aquaculture; fish ecology; climate change; habitat degradation

(This special issue belongs to the Section Aquatic Animals)

Ecotoxicology in Aquatic Animals: 2nd Edition

edited by

Halina Falfushynska

and

Piotr Rychter

submission deadline 31 Jan 2026 | 4 articles | Viewed by 2242 | Submission Open

Keywords: metals; pesticides; personal care products and pharmaceuticals; nanoparticles; oxidative stress; biotransformation; water animals; environmental pollution; immune toxicity; cytotoxicity

(This special issue belongs to the Section Aquatic Animals)

Aquatic Organisms Biomarkers in Toxicology: Assessing Exposure and Effects

edited by

Mariana Teles

and Camila de Fátima Pereira de Faria

submission deadline 15 Feb 2026 | Viewed by 238 | Submission Open

Keywords: fish biomarkers; aquatic toxicology; chemical exposure; environmental monitoring; ecotoxicology; biological indicators

(This special issue belongs to the Section Aquatic Animals)

Research on Fish Population Dynamics

edited by

Jie Cao

and Xiujuan Shan

submission deadline 15 Feb 2026 | Viewed by 168 | Submission Open

Keywords: fish population dynamics; stock assessment; recruitment; mortality; fisheries modeling; sustainable management; spatial population ecology

(This special issue belongs to the Section Aquatic Animals)

Gut Microbiota in Aquatic Animals

edited by

Gabriella do Vale Pereira

and

Fernando Yugo Yamamoto

submission deadline 28 Feb 2026 | 4 articles | Viewed by 8593 | Submission Open

Keywords: gut microbiota; aquatic animals; nutrition; physiology; host– microbe interaction; production efficiency; feed conversion ratio; antibiotics

(This special issue belongs to the Section Aquatic Animals)

Environmental Influence in Physiological, Endocrine and Oxidative Stress Responses in Fish

edited by Claire E. Couch

submission deadline 28 Feb 2026 | 1 articles | Viewed by 659 | Submission Open

Keywords: fish health; stress; physiology; fitness; environmental change

(This special issue belongs to the Section Aquatic Animals)

Fish Cognition and Behaviour

edited by

Asahi Ogi

submission deadline 28 Feb 2026 | 1 articles | Viewed by 554 | Submission Open

Keywords: cognitive processes; behavioral adaptations; social behavior; neurobiological foundations; fish ethology

(This special issue belongs to the Section Aquatic Animals)

Phylogeography, Speciation, and Molecular Evolution in Freshwater Aquatic Fauna

edited by

Narongrit Muangmai

and Sebastien Bernard Francis Lavoué

submission deadline 28 Feb 2026 | Viewed by 212 | Submission Open

Keywords: biogeography; freshwater biodiversity; population genomics; molecular systematics; cryptic spe-cies

(This special issue belongs to the Section Aquatic Animals)

Morphological and Physiological Research on Fish: Second Edition

edited by

Elena De Felice

and

Paola Scocco

submission deadline 15 Mar 2026 | 5 articles | Viewed by 4549 | Submission Open

Keywords: fish; anatomy; basic research; physiology; aquaculture

(This special issue belongs to the Section Aquatic Animals)

Neuroendocrine Responses to Environmental Challenges: Exploring Brain–Stress Interactions in Aquatic Species

edited by

Constanze Pietsch

submission deadline 15 Mar 2026 | 1 articles | Viewed by 1585 | Submission Open

Keywords: neuroendocrinology; aquatic species; brain– stress interactions; environmental adaptation

(This special issue belongs to the Section Aquatic Animals)

Recent Advances in Cephalopod Biology Research

edited by

Blondine Agus

and

Anna Di Cosmo

submission deadline 31 Mar 2026 | 1 articles | Viewed by 4355 | Submission Open

Keywords: cephalopods; fishery research; aquaculture; welfare; anatomy; age; reproduction; behavior

(This special issue belongs to the Section Aquatic Animals)

Additives in Fish Stress: Comparative Endocrine and Physiological Responses

edited by

Xiaodan Wang

submission deadline 31 Mar 2026 | 4 articles | Viewed by 2955 | Submission Open

Keywords: environmental stress; physiological response; fishes; adaptive mechanism

(This special issue belongs to the Section Aquatic Animals)

Novel Feeds Affect Fish Growth Performance and Immunity

edited by

Roberta Imperatore

submission deadline 31 Mar 2026 | 2 articles | Viewed by 1992 | Submission Open

Keywords: feed additives; insect meal; nutraceuticals; functional ingredients; pre- and pro-biotics; peripheral and central inflammation; immunity

(This special issue belongs to the Section Aquatic Animals)

Sustainable Aquaculture: A Functional Genomic Perspective

edited by Robert Mukiibi and

Yangzhen Li

submission deadline 15 Apr 2026 | Viewed by 165 | Submission Open

Keywords: transcriptomics; epigenomics; genomics; genomic selection; proteomics; metabolomics; GWAS; molecular-QTLs; sustainable aquaculture

(This special issue belongs to the Section Aquatic Animals)

Fish Gut Microbiota and Host Health: Current Advances and Emerging Frontiers

edited by

Francisco Vargas-Albores

, Estefania Garibay-Valdez and

Marcel Martínez-Porchas

submission deadline 30 Apr 2026 | 1 articles | Viewed by 829 | Submission Open

Keywords: gut microbiome; intestinal immunity; growth performance; intestinal health; immune response; oxidative stress

(This special issue belongs to the Section Aquatic Animals)

Biomineralogy: Interactions Between Benthic Organisms and Rocky Substrates

edited by

Martina Canessa

and Giorgio Bavestrello

submission deadline 30 Apr 2026 | Viewed by 443 | Submission Open

Keywords: benthic communities; quartz; mineral composition; lithology; calcite; surface roughness; thermal capacity; hardness

(This special issue belongs to the Section Aquatic Animals)

Innate Host Defence Mechanisms of Aquatic Animals

edited by

Marcia Saraiva

submission deadline 10 May 2026 | 1 articles | Viewed by 833 | Submission Open

Keywords: immunology; virus; bacteria; fungus; fungus-like

(This special issue belongs to the Section Aquatic Animals)

Reproductive Physiology and Genetics in Aquatic Animals

edited by Rafæl Campos-Ramos

submission deadline 20 May 2026 | Viewed by 64 | Submission Open

Keywords: aquatic animals; reproduction; endocrinology; physiology; genetics

(This special issue belongs to the Section Aquatic Animals)

Fish and Fisheries Under Ecosystem Changes

edited by

George Minos

submission deadline 31 May 2026 | Viewed by 148 | Submission Open

Keywords: fish biodiversity; fisheries management; ecosystem changes; climate change impacts; invasive species genetics; aquatic ecosystems; sustainable fisheries; habitat degradation; species competition; adaptive management

(This special issue belongs to the Section Aquatic Animals)

Fish Nutrition, Physiology and Management: Second Edition

edited by

Carlos Alfonso Alvarez-González

submission deadline 31 May 2026 | Viewed by 114 | Submission Open

Keywords: fish; aquaculture; production; physiology; sustainable production

(This special issue belongs to the Section Aquatic Animals)

Hormonal Control of Fish Reproduction: Insights From Molecular Endocrinology

edited by

Asok K. Dasmahapatra

submission deadline 31 May 2026 | Viewed by 73 | Submission Open

Keywords: gonadotropin-releasing hormones; gonadotropins; sex steroids (testosterone; estradiol); inhibin; kisspep-tins; neuropeptides; steroidogenesis; aquaporins; gene expression; miRNAs; epigenetics

(This special issue belongs to the Section Aquatic Animals)

Polluted Environments: Effects of Chemicals and Mixtures on Fish Physiology and Biochemistry

edited by

Ines Lacchetti

and

Arnold Rakaj

submission deadline 12 Jun 2026 | Viewed by 7 | Submission Open

Keywords: fish; aquatic animals; environmental risk; ecotoxicology; physiological responses; climate change; chemical contamination

(This special issue belongs to the Section Aquatic Animals)

Ecophysiology for Sustainable Crustacean Aquaculture

edited by Mariel Gullian-Klanian

submission deadline 15 Jun 2026 | Viewed by 33 | Submission Open

Keywords: ecophysiology; environmental stressors; health and welfare biomarkers; immunophysiology; water quality management; climate resilience; omics and modelling approaches

(This special issue belongs to the Section Aquatic Animals)

Innovations in Aquaculture: New Technologies, Culture Systems and Integration of Emerging Species

edited by Adolfo Jatobá and Bruno Silva

submission deadline 30 Jun 2026 | 7 articles | Viewed by 7437 | Submission Open

Keywords: integrated multitrophic aquaculture; biofloc technology; aquaponics; aquaculture recirculation system; new species

(This special issue belongs to the Section Aquatic Animals)

Advancing Sustainable Aquaculture: Enhancing Production Methods, Innovating Feeds, Promoting Animal Welfare and Minimizing Environmental Impact—2nd Edition

edited by

Cosmas Nathanailides

submission deadline 30 Jun 2026 | 1 articles | Viewed by 826 | Submission Open

Keywords: functional feed additives; fish feed innovation; aquaculture

(This special issue belongs to the Section Aquatic Animals)

Aquatic Animal Medicine and Pathology 2nd Edition: Host–Pathogen Interactions

edited by

Márcio Júlio Vicente Moreira

and

Florbela Soares

submission deadline 30 Jun 2026 | Viewed by 90 | Submission Open

Keywords: aquatic animals; aquaculture; aquaria; wild communities; host– pathogen crosstalk; global warming; epidemiological models; health monitoring; omics

(This special issue belongs to the Section Aquatic Animals)

Advances in Fish Toxicology and Pharmacology

edited by

Hiroki Teraoka

submission deadline 30 Jun 2026 | Viewed by 6 | Submission Open

Keywords: contamination; fish; medaka; pharmacology; toxicology; zebrafish

(This special issue belongs to the Section Aquatic Animals)

Physiological Responses of Fishes to Nutrition Management and Environmental Stresses—Second Edition

edited by

László Ardó

and

Janka Nagyné Biró

submission deadline 31 Jul 2026 | 1 articles | Viewed by 1011 | Submission Open

Keywords: environmental stress; aquaculture; stress resistance; feed composition; feed additives; fish physiology

(This special issue belongs to the Section Aquatic Animals)

Fish Diseases and Healthy Farming

edited by

Jing Dong

and

Shun Zhou

submission deadline 31 Jul 2026 | 2 articles | Viewed by 986 | Submission Open

Keywords: fish diseases; pathogenesis; virulence factors; fishery drugs; drug discovery; antibiotics; vaccines; probiotics; immunology; antimicrobial resistance; disease prevention; healthy farming; sustainable aquaculture; genomics & disease-resistant breeding

(This special issue belongs to the Section Aquatic Animals)

New Nutritional Strategies for Inducing Growth and Controlling Diseases in Aquaculture

edited by

Jorge Olmos-Soto

submission deadline 31 Jul 2026 | Viewed by 25 | Submission Open

Keywords: functional nutrition; bioactive compounds; probiotics; prebiotics and phytobiotics; nutrigenomics; epigenetic; antimicrobial compounds

(This special issue belongs to the Section Aquatic Animals)

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