Fish, as a topic, encompasses the study of aquatic, primarily gill-breathing vertebrates within ichthyology, integrating anatomy, physiology, ecology, evolution, and systematics across jawless (Agnatha), cartilaginous (Chondrichthyes), and bony (Osteichthyes) lineages. Research topics include osmoregulatory strategies in freshwater and marine environments, hydrodynamics of locomotion, sensory biology (e.g., lateral line and electroreception), reproductive modes, life-history strategies, and trophic interactions within aquatic food webs. Fish also serve as model systems in developmental biology, genomics, ecotoxicology, and conservation biology, with topics addressing population dynamics, stock assessment, habitat degradation, climate-driven distribution shifts, and biodiversity patterns in marine and inland waters.
Researchers have just published a study demonstrating that the flying gurnard (Dactylopterus volitans) emits sounds while simultaneously performing movements to communicate—a discovery that enriches our knowledge about the ...
Plants & Animals
Jan 29, 2026
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54
A great white shark is a masterwork of evolutionary engineering. These beautiful predators glide effortlessly through the water, each slow, deliberate sweep of the powerful tail driving a body specialized for stealth, speed ...
Evolution
Jan 28, 2026
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140
Scientists analyzing 443-million-year-old Scottish fossils have uncovered the early evidence that some of the first groups of vertebrates possessed surprisingly advanced eyes and traces of bone, reshaping our understanding ...
Molecular & Computational biology
Jan 28, 2026
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66
For decades, sharks have been the unintended victims of longline fisheries aimed at tuna and swordfish. Rising accidental catches have contributed to population declines and created serious challenges for both conservation ...
Ecology
Jan 26, 2026
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36
New fossil evidence from China suggests that some of our vertebrate ancestors had four eyes. The study, published in Nature, takes a closer look at a structure found in multiple 518 million-year-old fossils, which appears ...
New research has found that roughly half of Australia's freshwater fish are fond of snacking on animal and plant material, including fruits, from outside their aquatic habitats.
Plants & Animals
Jan 16, 2026
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104
A small revolution is happening in the fishing industry. Freshly frozen fish can now be thawed in a new way, and that means you will have access to super-fresh food from the sea—even if you live thousands of miles away.
Biotechnology
Jan 15, 2026
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171
Many migratory species such as birds, bats, whales, and fish cross national borders to complete their lifecycle and need internationally coordinated action to protect them. The Convention on the Conservation of Migratory ...
Plants & Animals
Jan 6, 2026
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22
The Atlantic wolffish is known for its powerful bite, capable of crushing hard-shelled prey with ease. Now, researchers have discovered that the fish's teeth don't just withstand these extreme forces, they respond in a way ...
Biotechnology
Jan 6, 2026
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66
Antarctic icefish are famous for living without red blood cells, but they are not alone. A species of needle-shaped, warm-water fish called the Asian noodlefish also lacks hemoglobin and red blood cells. Like icefish, its ...
Plants & Animals
Jan 2, 2026
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