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.
Reproduction is central to the survival of all living organisms. Over millions of years, animal species on Earth have evolved a remarkable variety of mating strategies, ranging from physical fights with competitors to mesmerizing ...
A rare fossil discovered near South America's largest known meteorite crater has been named a new species. Initially mistaken for a frog by locals, Leolepis matogrossensis is actually a species of ancient ray-finned fish—the ...
Paleontology & Fossils
Aug 5, 2026
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48
At first glance, it looks exactly like a seahorse. It has the same horse-shaped head tilted down from the body, the same curled, grasping tail and, in the males, a fully enclosed pouch for brooding the young.
Evolution
Aug 3, 2026
1
630
Whale sharks (Rhincodon typus)—the world's biggest fish—are one of the most charismatic marine species. They connect with the hearts of anyone lucky enough to encounter them, making people deeply curious about their lives ...
Plants & Animals
Jul 25, 2026
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381
Orcas are known to be smart and ruthless hunters. They've been observed hunting a variety of prey, with some species, such as whales, larger than themselves. They use a wide range of strategies to hunt and kill prey, but ...
Plants & Animals
Jul 23, 2026
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2092
Volunteers armed with chisels, brushes and protective goggles chip away at rock encasing the bones of a massive prehistoric amphibian in a glass-walled laboratory on the ground floor of Warsaw's Copernicus Science Centre.
Paleontology & Fossils
Jul 22, 2026
0
225
New video evidence has revealed whale sharks, the largest fish in the sea, are serial snackers, feeding on large amounts of small prey at all ocean depths, according to research led by the Australian Institute of Marine Science ...
Plants & Animals
Jul 21, 2026
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18
Today, oceans host a large variety of fast, resilient marine predators, including tunas, mackerels and various other fish species. Many of these fish belong to a lineage known as Scombridae, whose members are characterized ...
New research reveals the unusual shape, size and pattern of the dermal denticles that cover basking sharks—thought to be unique to this species. Researchers propose that the shape and arrangement of the skin's scales protect ...
Plants & Animals
Jul 9, 2026
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24
New research is redefining the morphological and functional existence of anatomical "neck" regions to better include previously exempted vertebrates such as fishes and amphibians, changing the status quo of what it means ...
Plants & Animals
Jul 8, 2026
0
8
