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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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Advances in Fish Reproductive Physiology

edited by Walisson De Souza e Silva, Deliane Cristina Costa,

Wei Ge

and Raphael Nogueira Bahiense

submission deadline 10 Jan 2026 | 6 articles | Viewed by 6411 | Submission Open

Keywords: reproduction; fish; endocrinology; gametogenesis; spawning; hormones; gonads; aquaculture; ovulation; spermatogenesis

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

Advances in Catfish Research

edited by

Liqiang Zhong

Kai Hao

Zhengyong Wen

and Shiyong Zhang

submission deadline 10 Jan 2026 | 1 articles | Viewed by 835 | Submission Open

Keywords: catfish; genetics; breeding; nutritional requirements; immunology; physiology and biochemistry; aquaculture techniques

Physiology and Aquaculture of Pearl-Producing Mollusks

edited by Pedro E. Saucedo

submission deadline 10 Jan 2026 | Viewed by 305 | Submission Open

Keywords: aquaculture; marine mollusks; freshwater mollusks; physiology of pearl-producing mollusks; pearl culture

(This special issue belongs to the Section Aquatic Invertebrates)

Trophic Ecology of Freshwater and Marine Fish Species

edited by Davide Cicala, Ying Xue, Kai Wang and

Rijin Jiang

submission deadline 15 Jan 2026 | 4 articles | Viewed by 7100 | Submission Open

Keywords: fish; trophic niches; trophic ecology; food web; dietary composition; feeding strategies

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

Adaptation and Response of Fish to Environmental Changes

edited by Jie Li, Mingdian Liu and

Yaqiu Liu

submission deadline 15 Jan 2026 | 7 articles | Viewed by 6909 | Submission Open

Keywords: eco-physiology; behavior monitoring; ecological adaptation; climate change; human activities

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

Biology and Culture of Marine Invertebrates

edited by

and

submission deadline 15 Jan 2026 | 4 articles | Viewed by 2482 | Submission Open

Keywords: marine invertebrates; biology; aquaculture

(This special issue belongs to the Section Aquatic Invertebrates)

Seafood Products: Nutrients, Safety, and Sustainability

edited by

Giustino Tribuzi

and Marília Miotto

submission deadline 15 Jan 2026 | 1 articles | Viewed by 1657 | 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)

Conservation and Population Genetics of Fishes

edited by Dongmei Xiong

submission deadline 20 Jan 2026 | 5 articles | Viewed by 6113 | Submission Open

Keywords: conservation of endangered fishes; genetic diversity; population genetics; species delimitation; population structure and genetic divergence; adaptive evolution; polygenic relationship; genome-wide data

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

Advancing Fish Nutrition Research for Sustainable Aquaculture

edited by

Simon Das

and Leo Nankervis

submission deadline 20 Jan 2026 | 2 articles | Viewed by 3489 | Submission Open

Keywords: fish nutrition; alternative feed formulation; protein source optimization; sustainable aquaculture; essential amino acid; fishmeal; hepatic health; growth indices; digestion physiology; tropical species adaptation

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

Molecular Mechanism of Fish Immune Response to Pathogens

edited by

Qiuning Liu

submission deadline 20 Jan 2026 | 3 articles | Viewed by 2495 | Submission Open

Keywords: fish; immune response; pathogens; omics; molecular mechanism

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

Parasites in Aquaculture

edited by Marine Combe

submission deadline 20 Jan 2026 | Viewed by 234 | Submission Open

Keywords: parasites; farmed aquatic animals; infections; prevalence; virulence; diversity; disease emergence; disease ecology; disease management

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

Advances in Cytogenetics of Fish

edited by

Francisco Sassi

, Ricardo Utsunomia and

Tariq Ezaz

submission deadline 21 Jan 2026 | Viewed by 337 | Submission Open

Keywords: cytogenomics; sex chromosomes; B chromosomes; repetitive DNA; karyotype; chromosomal evolution

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

Intestinal Health of Aquatic Organisms

edited by Mao Lin,

Yunzhang Sun

and

Yibin Yang

submission deadline 25 Jan 2026 | 5 articles | Viewed by 5579 | 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)

Building a Sustainable Future for Inland Fisheries and Aquaculture in a Time of Multiple Stressors

edited by

Ana Gavrilović

, Jurica Jug-Dujaković, Ivan Špelić and Tena Radočaj

submission deadline 31 Jan 2026 | 1 articles | Viewed by 1744 | Submission Open

Keywords: sustainable aquaculture; aquaculture developments; freshwater aquaculture; sustainable inland fisheries; aquatic invasive species

Tilapia Aquaculture: State-of-the-Art

edited by

Jun Qiang

, Jianmeng Cao,

Lanmei Wang

and

Wen Wang

submission deadline 31 Jan 2026 | 1 articles | Viewed by 428 | Submission Open

Keywords: Tilapia; aquaculture; breeding; nutrition; disease; aquatic economy; germplasm resources

Pivotal Roles of Feed Additives for Fish

edited by

Marco Shizuo Owatari

submission deadline 10 Feb 2026 | 3 articles | Viewed by 12272 | 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)

Advances in Shellfish Aquaculture

edited by

Yuanzi Huo

and Emily Kunselman

submission deadline 10 Feb 2026 | Viewed by 237 | Submission Open

Keywords: shellfish aquaculture; disease management; shellfish genomics; sustainable production; nutritional physiology; biosecurity; environmental impact; hatchery technology; aquaculture policy; integrated multi-trophic aquaculture (IMTA)

(This special issue belongs to the Section Sustainable Aquaculture)

Dietary Supplementation in Aquaculture

edited by

Neculai Patriche

and

Elena Sîrbu

submission deadline 15 Feb 2026 | 3 articles | Viewed by 3954 | 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 | 2 articles | Viewed by 2312 | 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 3346 | 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 124 | 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 2303 | 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 | 1 articles | Viewed by 855 | 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 1015 | 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 214 | 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)

Reproduction, Embryogenesis and Larviculture of Fish in Captivity

edited by Sergio Ricardo Batlouni

submission deadline 28 Feb 2026 | Viewed by 209 | Submission Open

Keywords: reproduction; larviculture; induced spawning

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 638 | 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

Feature Papers by Fishes’ Editorial Board Members

edited by

Maria Angeles Esteban

submission deadline 10 Mar 2026 | 1 articles | Viewed by 695 | 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 251 | 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 246 | 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 | 3 articles | Viewed by 3275 | 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 400 | 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 2621 | 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 1397 | 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 396 | 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 727 | 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 | 4 articles | Viewed by 1551 | Submission Open

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

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 230 | Submission Open

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

Effects of Dietary Ingredients on Fish Nutrition and Health

edited by

Jorge Palma

submission deadline 31 Mar 2026 | Viewed by 116 | 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)

Enforcement and Compliance in Fisheries

edited by Geir Hønneland

submission deadline 1 Apr 2026 | Viewed by 190 | Submission Open

Keywords: compliance; enforcement; IUU fishing; fisheries management; law of the sea; ocean governance; blue crime

(This special issue belongs to the Section Fishery Economics, Policy, and Management)

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 9554 | 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 | 3 articles | Viewed by 1744 | 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 | 6 articles | Viewed by 9555 | 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 1400 | 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 456 | 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 317 | 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 93 | Submission Open

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

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

Applications of Hydroacoustic Technology to Marine Ecology and Fisheries

edited by Xiaoqin Zang and Leif Rasmuson

submission deadline 20 Apr 2026 | Viewed by 168 | Submission Open

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

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

edited by