Microbiome in Fish and Their Living Environment, Second Edition

Dear Colleagues,

This Special Issue is a continuation of our 2025 Special Issue “Microbiome in Fish and Their Living Environment”.

Over the past few decades, aquaculture has emerged as one of the fastest-growing food-producing sectors, playing a crucial role in providing high-quality protein for humans. Globally, total aquaculture production reached 130.9 million tons in 2022, with fish accounting for 53% of this total. Thus, fish farming plays a vital role in the global aquaculture industry. Fish are the most diverse group of vertebrates, and there are huge quantities of microorganisms in the gut of fish. Fish immunity can shape the intestinal microbiota and maintain intestinal homeostasis. Additionally, the intestinal microbiome can control the proliferation of pathogenic microorganisms and regulate fish immunity. Dietary composition (nutrient balance and the inclusion of probiotics, prebiotics, postbiotics, and other feed additives) has a significant impact on the microbiomes in fish gut and their living environment, thereby regulating intestinal health and disease resistance. In this collection, we particularly welcome papers that provide insights into the effects of dietary input on the gut microbiome of fish, interactions between gut microbiomes and fish immunity, and interactions between the gut microbiomes of fish and their living environment.

Dr. Yongjun Chen
Dr. Gang Yang
Guest Editors

Manuscript Submission Information

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