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.
Adelaide University researchers have found that some estuarine fishes that live in habitats with highly variable temperatures can withstand the warmer ocean conditions expected to result from climate change.
Ecology
Oct 22, 2026
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9
The glacial Arctic Ocean was not a barren ice desert but a breeding ground for the evolution of cold adaptation in marine fish. This is the main conclusion of a new scientific publication from Stockholm University that examines ...
Evolution
Oct 21, 2026
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22
A shark that has become a viral sensation in South Korea was coaxed out of a canal in which it was stuck, authorities said on Wednesday, as falling temperatures raised concerns for its survival.
Ecology
Oct 21, 2026
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9
South Korean authorities began a new attempt Wednesday to coax a shark-turned-viral sensation back to sea, with falling temperatures in the Busan canal where it is stranded raising concerns for its survival.
Plants & Animals
Oct 21, 2026
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18
Male seahorses, fishes that belong to the Syngnathidae family, show a distinctive reproductive strategy in which males carry developing embryos in a brood pouch. Their most distinctive feature is the brood pouch on the ventral ...
Plants & Animals
Oct 20, 2026
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13
Preliminary results from an ongoing long-term survey conducted by William & Mary's Virginia Institute of Marine Science (VIMS) suggest that an average year class of young-of-year striped bass was produced in the Virginia ...
Ecology
Oct 19, 2026
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13
Paired appendages—the pectoral and pelvic fins of fishes and the forelimbs and hindlimbs of tetrapods—were a major innovation in vertebrate evolution. Their emergence greatly expanded the ways vertebrates could move through ...
Evolution
Oct 19, 2026
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23
A new model using sturgeon as a material analog has made it possible to estimate how the backbones of some of the first animals on land could and could not move. These results disprove a long-standing hypothesis that changes ...
Evolution
Oct 14, 2026
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12
Just a few centimeters long, slimy and covered in razor-sharp spines, baby sturgeons look like creatures from one of the Alien movies. But for the people who pull them from the river, these diminutive ugly ducklings of the ...
Plants & Animals
Oct 14, 2026
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29
A new species of ancient crocodile relative that lived around 170 million years ago has been discovered by scientists at the University of Portsmouth and Hassan II University of Casablanca, Morocco.
Paleontology & Fossils
Oct 12, 2026
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