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.
An Australian freshwater Murray cod has surprised scientists by swimming a marathon 860 kilometers (530 miles) along a major river system—believed to be a record for the species.
Plants & Animals
Oct 27, 2025
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97
Imagine you are a kind of fish called a goby, part of a huge family of more than 2,000 species. Maybe you're of average size for a goby, about three to four inches long. Your longest relative is about four times your length—more ...
Plants & Animals
Oct 22, 2025
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91
One of the enduring ichthyological mysteries is how migratory fish know when it is time to move from their winter to summer habitats. The ability to tell when the seasons are changing is crucial for a wide range of major ...
Plants & Animals
Oct 22, 2025
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24
Fossilized fish ear stones—known as otoliths—can reveal far more than previously thought. In a recent study, a team of paleontologists from the University of Vienna demonstrated that a refined electron microscopy technique ...
Plants & Animals
Oct 16, 2025
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23
A Curtin University-led international study has solved the mystery of how the skin of a fossilized fish was able to be preserved for 52 million years, extending our understanding of how even the most delicate of biological ...
Cell & Microbiology
Oct 13, 2025
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51
Colorful tropical fish are heading south along the WA coast, including around Rottnest. This sounds spectacular, but it's not.
Plants & Animals
Oct 8, 2025
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39
Carbon is the chemical element found in the greenhouse gas CO₂ emitted from fossil fuels burned in cars, factories and other sources. When carbon is stored in the ocean instead of remaining in the atmosphere, it helps to ...
Ecology
Oct 7, 2025
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22
Four-limbed vertebrates, known as tetrapods, have two enlarged areas in their spinal cords. The two enlargements have a correlation with the forelimbs and hind limbs, respectively. These enlargements are thought to be caused ...
Plants & Animals
Oct 7, 2025
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25
A new manuscript published in the Journal of Fish Biology reveals that relationships between fish and sea anemones are more diverse than those portrayed in "Finding Nemo." Captured through breathtaking blackwater photography, ...
Ecology
Oct 7, 2025
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19
When saltwater fish long ago evolved to live in fresh water, many of them also evolved a more sophisticated hearing system, including middle ear bones similar to those in humans.
Evolution
Oct 2, 2025
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