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.
Many fish appear to hang effortlessly in the water while they wait for prey, defend a nest or pause between bursts of activity. But our research shows that this quiet stillness is anything but effortless. Hovering, the behavior ...
Plants & Animals
Feb 21, 2026
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56
Researchers at Osaka Metropolitan University in Japan have discovered a previously undiscovered behavior in cleaner wrasse (Labroides dimidiatus). When presented with a mirror, the tiny fish not only recognized themselves, ...
Plants & Animals
Feb 20, 2026
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Growing up, you probably changed your style based on your social influences. It turns out, such pressures affect the appearance of young clownfish (anemonefish) too. A new study from the Okinawa Institute of Science and Technology ...
Evolution
Feb 19, 2026
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25
The deep sea is cold, dark and under immense pressure. Yet life has found a way to prevail there, in the form of some of Earth's strangest creatures.
Ecology
Feb 14, 2026
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342
During 2026, new legislation—the result of an agreement between the UK Government and the European Union—is planned to come into force for recreational pollack fishing that limits catches to three fish per angler per day. ...
Ecology
Feb 12, 2026
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14
Researchers have identified a new type of visual cell in deep-sea fish larvae that challenges a century of knowledge about vertebrate visual systems. Dr. Fabio Cortesi from The University of Queensland's School of the Environment ...
Ecology
Feb 11, 2026
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32
On April 20, 2023, a juvenile great white shark (Carcharodon carcharias) measuring approximately 210 cm and weighing between 80 and 90 kg was incidentally caught by local fishermen off the coast of the eastern peninsula within ...
Plants & Animals
Feb 10, 2026
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10136
A new international study reveals the unexpected importance of acoustic communication in the evolution of boxfishes. This discovery offers new perspectives on the role of acoustic communication in the evolutionary history ...
Plants & Animals
Feb 10, 2026
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36
How did the complexity of many organisms living today evolve from the simpler body plans of their ancestors? This is a central question in biology. Take our hands, for example: Every time we type a message on our mobile phone, ...
Evolution
Feb 9, 2026
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90
A study conducted by researchers at the University of Liège on a large population of Japanese giant salamanders—one of the largest amphibians in the world—reveals that above a certain size, a spectacular transition occurs ...
Plants & Animals
Feb 5, 2026
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