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Fishes 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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Pivotal Roles of Feed Additives for Fish

edited by

Marco Shizuo Owatari

submission deadline 10 Feb 2026 | 4 articles | Viewed by 13321 | Submission Open

Keywords: aquaculture; fish farming; feed additives; nutrition; functional feed; essential oils; probiotics; postbiotics; organic salts

(This special issue belongs to the Section Nutrition and Feeding)

Dietary Supplementation in Aquaculture

edited by

Neculai Patriche

and

Elena Sîrbu

submission deadline 15 Feb 2026 | 5 articles | Viewed by 4709 | Submission Open

Keywords: nutrition; physiology; feed additives; nutrients; biochemistry; immunity

(This special issue belongs to the Section Nutrition and Feeding)

Infection and Detection of Bacterial Pathogens in Aquaculture

edited by Asma M. Karami and

Raquel Rodríguez-Vázquez

submission deadline 15 Feb 2026 | 4 articles | Viewed by 2975 | Submission Open

Keywords: molecular diagnostics; fish health; innate immunity; sustainable disease management; emerging infectious diseases

(This special issue belongs to the Section Welfare, Health and Disease)

Sustainable Management of Small-Scale and Data-Limited Fisheries: Diagnosis and Strategies

edited by

Mohamed Samy-Kamal

and

José Luis Sánchez-Lizaso

submission deadline 20 Feb 2026 | 3 articles | Viewed by 3792 | Submission Open

Keywords: data-limited fisheries; fishery management; management measures; monitoring programs; small-scale fisheries; stock assessment; sustainability

Environmental Change Impacts on Freshwater Fish Communities

edited by

Thiago Bernardi Vieira

submission deadline 20 Feb 2026 | Viewed by 144 | Submission Open

Keywords: fish ecology; aquatic conservation; Anthropocene impacts; climate change effects; freshwater biodiversity; microplastic pollution; agrochemical contamination; riparian degradation; community-based conservation; functional trait diversity; metacommunity dynamics

(This special issue belongs to the Section Environment and Climate Change)

The Ecology of Reef Fishes

edited by

Carlos Werner Hackradt

, Fabiana Cézar Félix-Hackradt and

João Lucas Leão Feitosa

submission deadline 25 Feb 2026 | 2 articles | Viewed by 2635 | Submission Open

Keywords: coral reef fish ecology; anthropogenic impacts; functional ecology; population dynamics; community structure; movement ecology; genetic diversity; reef fish conservation

Genetic Breeding and Immunity of Aquatic Animals

edited by Zhe Zheng, Xiaohui Cai,

Ruijuan Hao

and

Jin-lian Liang

submission deadline 25 Feb 2026 | 2 articles | Viewed by 1132 | Submission Open

Keywords: genetic breeding; aquatic animal immunity; disease resistance; genomic selection; gene editing

(This special issue belongs to the Section Genetics and Biotechnology)

Advances in the Immunology of Aquatic Animals

edited by

Zhitao Qi

Bei Huang

and Mingzhu Pan

submission deadline 28 Feb 2026 | 2 articles | Viewed by 1344 | Submission Open

Keywords: aquatic immunology; fish health; vaccine development; pathogen– host interaction; One Health; eco-immunology; aquaculture resilience; probiotics; climate stress; antimicrobial resistance; omics technologies

(This special issue belongs to the Section Welfare, Health and Disease)

Sustainable Aquaculture of Crustaceans

edited by

Luis Otavio Brito

and Suzianny Maria Bezerra Cabral Da Silva

submission deadline 28 Feb 2026 | Viewed by 240 | Submission Open

Keywords: sustainable aquaculture; crustacean farming; marine and freshwater shrimps; lobsters; crabs; crayfish; microcrustaceans; reproduction and breeding; growth performance; health management; functional feed additives; fishmeal replacement; aquafeed innovation; Biofloc and Synbiotic technology; integrated multi-trophic aquaculture (IMTA); Aquaculture 4.0; environmental management

(This special issue belongs to the Section Sustainable Aquaculture)

Population Genomics for Freshwater Fish Conservation: From Markers to Management

edited by

Kang-Rae Kim

and In-Chul Bang

submission deadline 1 Mar 2026 | 1 articles | Viewed by 787 | Submission Open

Keywords: fish genetics; Genomics; fish conservation; genetic markers; microsatellite marker; whole genome sequencing; effective population size; eDNA monitoring; mitochondrial DNA; adaptive introgression; population genetics; population genomics; artificial breeding of genetics

Seafood Products: Nutrients, Safety, and Sustainability

edited by

Giustino Tribuzi

and Marília Miotto

submission deadline 5 Mar 2026 | 1 articles | Viewed by 1857 | Submission Open

Keywords: fish; mollusks; seafood processing; byproducts; nutritional quality; seafood bioactive compounds; contamination; microplastics; phycotoxins

(This special issue belongs to the Section Processing and Comprehensive Utilization of Fishery Products)

Feature Papers by Fishes’ Editorial Board Members

edited by

Maria Angeles Esteban

submission deadline 10 Mar 2026 | 1 articles | Viewed by 990 | Submission Open

Keywords: aquatic biodiversity; climate change’ s impacts; pollution; antimicrobial resistance; sustainable aquaculture; genetic improvement; ecosystem-based management; blue biotechnology; fish welfare; seafood traceability

Ecology and Treatment of Parasitic Diseases in Aquatic Species

edited by

Patrick Mathews Delgado

submission deadline 10 Mar 2026 | 1 articles | Viewed by 434 | Submission Open

Keywords: smart nanoparticles; biomolecules; antimicrobial; antiparasite; hybrid nanomaterial; eco-friendly nanomaterials; natural products; drug delivery systems; phytogenic compounds; essential oils; environmental influences on development of parasite disease

(This special issue belongs to the Section Welfare, Health and Disease)

Impacts of Climate Change on Physiology and Ecology of Aquatic Organisms

edited by

Zhihua Li

, Xinguo Zhao, Yuming Zhang and Ping Li

submission deadline 10 Mar 2026 | Viewed by 278 | Submission Open

Keywords: climate change; aquatic organisms; physiological ecology; adaptation strategies; environmental management

Advances in Pathology of Aquatic Animals

edited by Maria Cristina Chávez-Sánchez

submission deadline 15 Mar 2026 | 4 articles | Viewed by 3796 | Submission Open

Keywords: disease responses to nutritional and environmental stress (pollution and climate change); host– pathogen interactions and novel treatments; genomic approaches to infectious diseases; host– microbiota and immune responses; emerging technologies in fish farming health and welfare (diagnostic; prevention; biosensors; AI; etc.); functional supplements/additives in aquatic animal health

(This special issue belongs to the Section Fish Pathology and Parasitology)

Advances in Tilapia Aquaculture

edited by

Carlos Eduardo Copatti

, Rodrigo Fortes-Silva and Leandro Santos Costa

submission deadline 15 Mar 2026 | 1 articles | Viewed by 698 | Submission Open

Keywords: tilapia aquaculture; sustainable nutrition; physiology; technology; genetic; breeding; disease management; water quality; behavior

(This special issue belongs to the Section Sustainable Aquaculture)

Genomics Applied to Fish Health

edited by

Phillip Dettleff

submission deadline 20 Mar 2026 | 2 articles | Viewed by 2890 | Submission Open

Keywords: aquaculture; genomics; transcriptomics; proteomics; sustainability; fish health; infectious disease; metabolic diseases

(This special issue belongs to the Section Welfare, Health and Disease)

The Impact of Contamination on Fishes

edited by

Zrinka Dragun

Tatjana Mijošek Pavin

and

Dušica Ivanković

submission deadline 20 Mar 2026 | 2 articles | Viewed by 1665 | Submission Open

Keywords: bioaccumulation; biomarkers; eDNA; freshwater; histopathology; marine; metallomics; metals/metalloids; microplastics; organic contaminants

(This special issue belongs to the Section Environment and Climate Change)

Molecular Phylogeny and Taxonomy of Aquatic Animals

edited by

Pedro F. Amorim

and

José Leonardo de Oliveira Mattos

submission deadline 20 Mar 2026 | 1 articles | Viewed by 546 | Submission Open

Keywords: biodiversity; biogeography; conservation; distribution; evolution; genetics; ichthiology; systematics; taxonomy; zoology

(This special issue belongs to the Section Taxonomy, Evolution, and Biogeography)

Crustacean Health, Stress and Disease

edited by

Cheng Chi

Jie Ji

and

Hengtong Liu

submission deadline 25 Mar 2026 | 1 articles | Viewed by 787 | Submission Open

Keywords: crustaceans; health; stress; disease; immune system; aquaculture; pathogenesis; environmental stressors; host– pathogen interactions; sustainability

(This special issue belongs to the Section Welfare, Health and Disease)

Advances in Fisheries Economics

edited by Daqing Wu

submission deadline 31 Mar 2026 | 7 articles | Viewed by 2902 | Submission Open

Keywords: bioeconomic modeling; economic valuation; fisheries decision-making; seafood trade; resilience

Effects of Dietary Ingredients on Fish Nutrition and Health

edited by

Jorge Palma

submission deadline 31 Mar 2026 | 1 articles | Viewed by 418 | Submission Open

Keywords: fish nutrition; functional feeds; alternative protein sources; alternative nutritional sources; gut microbiota; immune function; nutrient bioavailability; feed efficiency; fish health; sustainable aquaculture

(This special issue belongs to the Section Nutrition and Feeding)

Advancing the Research and Conservation of the Estuarine and Coastal Ecosystems of California and Baja California

edited by

Pedro Morais

and

Julio Lorda

submission deadline 31 Mar 2026 | Viewed by 246 | Submission Open

Keywords: estuarine ecosystems; estuaries; coastal lagoons; tidal habitats; biology; ecology; conservation; management; physical oceanography; chemical oceanography; biological oceanography

Biodiversity and Spatial Distribution of Fishes, Second Edition

edited by

Heng Zhang

, Ying Xue and Luoliang Xu

submission deadline 10 Apr 2026 | 8 articles | Viewed by 10443 | Submission Open

Keywords: fish biodiversity; spatial– temporal dynamics; fish community; environmental impact factors; climate change; species distribution; eDNA; ecological modelling; community structure

(This special issue belongs to the Section Biology and Ecology)

Genetics and Breeding of Fishes

edited by Wuhui Li

submission deadline 10 Apr 2026 | 4 articles | Viewed by 2229 | Submission Open

Keywords: fish breeding techniques; reproduction; genetics and genomics; sustainable aquaculture

(This special issue belongs to the Section Genetics and Biotechnology)

Toxicology of Anthropogenic Pollutants on Fish

edited by

Zhongdian Dong

submission deadline 15 Apr 2026 | 7 articles | Viewed by 10267 | Submission Open

Keywords: anthropogenic pollutants; fish toxicology; aquatic ecosystems; organic pollutants; microplastics; trace elements; environmental protection

(This special issue belongs to the Section Environment and Climate Change)

Advances in Carp: Genetic Improvement and Biotechnology

edited by

Jun Jiang

Xuan Xie

and Kaiqi Lian

submission deadline 15 Apr 2026 | 2 articles | Viewed by 1795 | Submission Open

Keywords: carp; genome mining; gene function; genetic breeding; gene editing; xenotransplantation; germplasm preservation; spermatogenesis; disease diagnosis and control

Advances in Shrimp Physiology and Genomics

edited by

Zhongkai Wang

and Yuquan Li

submission deadline 15 Apr 2026 | 1 articles | Viewed by 687 | Submission Open

Keywords: crustaceans; shrimp; aquaculture; physiology; genomics; genetics; transcriptomics; proteomics; metabolomics

(This special issue belongs to the Section Aquatic Invertebrates)

Molecular Mechanisms of Fish Immune Response

edited by

Zhujin Ding

submission deadline 15 Apr 2026 | Viewed by 351 | Submission Open

Keywords: aquatic animals; fish; immune system; immune response; host-pathogens interactions; molecular mechanisms

(This special issue belongs to the Section Welfare, Health and Disease)

Fish Fossils: Paleontology’s Window to the Past

edited by

Tuo Qiao

submission deadline 18 Apr 2026 | Viewed by 121 | Submission Open

Keywords: paleoichthyology; phylogeny; evolution; paleoenvironment; imaging and analytical techniques

(This special issue belongs to the Section Taxonomy, Evolution, and Biogeography)

Welfare and Stressor in Aquaculture: Mechanisms, Management, and Sustainable Solutions

edited by

Kai Zhang

and Guangjun Wang

submission deadline 20 Apr 2026 | 1 articles | Viewed by 233 | Submission Open

Keywords: aquatic animal welfare; sustainable aquaculture; physiological and behavioral responses; smart aquaculture technologies

(This special issue belongs to the Section Welfare, Health and Disease)

Applications of Hydroacoustic Technology to Marine Ecology and Fisheries

edited by Xiaoqin Zang and Leif Rasmuson

submission deadline 20 Apr 2026 | Viewed by 191 | Submission Open

Keywords: hydroacoustic technology; aquatic ecology; acoustic telemetry; passive acoustic monitoring; fish passage; hydropower; offshore wind; marine hydrokinetic energy; acoustic surveys

Effects of New Environmental Pollutants on Aquatic Ecosystems and Species

edited by

Shan Liu

submission deadline 25 Apr 2026 | Viewed by 187 | Submission Open

Keywords: environment pollutants; aquatic organisms; bioaccumulation; biomagnification; effects toxicity; marine animals; aquatic ecosystem

(This special issue belongs to the Section Environment and Climate Change)

Advances in the Application of Microalgae in Aquaculture

edited by Yihong Zheng and

Wujie Xu

submission deadline 28 Apr 2026 | 1 articles | Viewed by 393 | Submission Open

Keywords: microalgae; sustainable aquaculture; aquafeed; fish nutrition; omega-3 fatty acids; protein alternatives; bioactive compounds; aquatic animal health; feed technology; sustainability

(This special issue belongs to the Section Sustainable Aquaculture)

Aquatic Ecotoxicology: Field and Laboratory Approaches

edited by Yuri Dornelles Zebral

submission deadline 30 Apr 2026 | 2 articles | Viewed by 5445 | Submission Open

Keywords: ecotoxicology; monitoring programs; experimental studies; biomarkers; metals; organic pollution; pesticides; legacy contaminants; emergent contaminants; climate crisis

(This special issue belongs to the Section Physiology and Biochemistry)

Vantage Points in the Morphology of Aquatic Organisms

edited by Peter S. Johnston

submission deadline 30 Apr 2026 | 2 articles | Viewed by 1680 | Submission Open

Keywords: morphology; palaeontology; aquatic; vertebrate; invertebrate; fish; cetacean

(This special issue belongs to the Section Biology and Ecology)

Impact of Plastic and Fiber Pollution on Aquatic Animals

edited by

Fabiola Lango-Reynoso

María Del Refugio Castañeda-Chávez

and Angel Moran-Silva

submission deadline 30 Apr 2026 | Viewed by 254 | Submission Open

Keywords: aquatic organisms; aquatic systems; emerging contaminants; microplastic; fiber; aquaculture; fischeries; aquatic health; safety

(This special issue belongs to the Section Environment and Climate Change)

Ecological Aquaculture and Disease Prevention and Control

edited by Yichao Ren and Chunyan Zhao

submission deadline 30 Apr 2026 | Viewed by 175 | Submission Open

Keywords: ecological aquaculture; environmental factor; disease control; antibiotic alternatives; sustainable aquaculture; stress; adaptation; environmental acclimatization

Age Determination of Aquatic Animals

edited by Raouf W. Kilada

submission deadline 10 May 2026 | 3 articles | Viewed by 2912 | Submission Open

Keywords: age; validation; growth; shells; cephalopod; echinoderms; crustaceans; fish

Stress Ecology of Aquatic Animals

edited by

Albena Alexandrova

and Nesho H. Chipev

submission deadline 10 May 2026 | Viewed by 199 | Submission Open

Keywords: adaptation and resilience; aquatic pollution; climate change impacts; environmental stressors; marine ecophysiology; multi-stressor interactions

(This special issue belongs to the Section Environment and Climate Change)

Fish Disease Prevention: Immune Defense and Vaccine Development

edited by

Rongrong Ma

and

Yongxiang Yu

submission deadline 10 May 2026 | Viewed by 171 | Submission Open

Keywords: fish disease prevention; immune mechanisms; vaccine development; diagnostics and biosecurity; aquaculture

(This special issue belongs to the Section Welfare, Health and Disease)

Sustainable Aquaculture and Seafood Production

edited by

Ewen Mclean

submission deadline 10 May 2026 | Viewed by 166 | Submission Open

Keywords: governance; economic viability; climate change; social well-being; environmental impact; feed ingredients; animal health and welfare; engineering; product quality; automation

Intestinal Health of Aquatic Organisms

edited by Mao Lin,

Yunzhang Sun

and

Yibin Yang

submission deadline 15 May 2026 | 5 articles | Viewed by 6260 | Submission Open

Keywords: gut health; gut microbiota; biodiversity; probiotics; prebiotics; postbiotics; bacteriophage; immune function; nutrient absorption; disease resistance

(This special issue belongs to the Section Welfare, Health and Disease)

Fish Farming in Recirculating Aquaculture Systems

edited by Baoliang Liu and Wenyang Li

submission deadline 15 May 2026 | 2 articles | Viewed by 5328 | Submission Open

Keywords: recirculating aquaculture system; indoor aquaculture; zero water exchange aquaculture; aquaculture environment

(This special issue belongs to the Section Sustainable Aquaculture)

Germplasm Resources and Genetic Breeding of Aquatic Animals

edited by

Yang Liu

and

Yongsheng Tian

submission deadline 15 May 2026 | 4 articles | Viewed by 3072 | Submission Open

Keywords: germplasm preservation and utilization; genome evolution; omics analysis; economic traits; functional gene; mitochondrial genome; microsatellite; growth and development

(This special issue belongs to the Section Genetics and Biotechnology)

Physiological and Behavioral Studies in Aquaculture

edited by

Zhishuai Hou

submission deadline 15 May 2026 | Viewed by 172 | Submission Open

Keywords: aquaculture; physiology; behavior; stress response; metabolism; neuroendocrine regulation; nutrition; welfare; environmental adaptation; sustainable aquaculture

Nutritional Modulation of Brain Function and Behavior in Aquatic Animals

edited by

Helen Miliou

and

Aristeidis Tsopelakos

submission deadline 15 May 2026 | Viewed by 131 | Submission Open

Keywords: fatty acids; n-3 LC-PUFA; fish nutrition; neurotransmitters; brain physiology; stress response; fish welfare; sustainable aquafeeds; alternative lipids; valorization of discards

(This special issue belongs to the Section Nutrition and Feeding)

Evolutionary Biology of Aquatic Animals

edited by

and

submission deadline 15 May 2026 | Viewed by 123 | Submission Open

Keywords: marine organism; population genetics; biological diversity; adaptative evolution; conservation genetics; phylogeny

(This special issue belongs to the Section Taxonomy, Evolution, and Biogeography)

Green Sustainable Aquaculture and Environmental Control