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A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scales, which can also provide effective camouflage through the use of reflection and colouration, as well as possible hydrodynamic advantages.
Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology , which is the study of how the component parts of fish function together in the living fish. [ 1 ]
Cosmine was first described in the Osteolepiform Megalichthys hibberti by Williamson in 1849, in a purely descriptive, pre-Darwinian, non-evolutionary framework. [4] Goodrich [5] expanded on Williamson's descriptions, hypothesizing a transition from a monoodontode scale (like a chondryicthian placoid scale) to a complex polyodontode scale through fusion of discrete units.
Asian arowana scales are large (most over 2 cm in length) and have a delicate net pattern. Asian arowanas grow up to 90 cm (35 in) total length . [ 9 ] Like all Scleropages , Asian arowanas have long bodies; large, elongated pectoral fins , dorsal and anal fins located far back on the body; and a much larger caudal fin than that of their South ...
Scales vary significantly in shape, size, and consistency, and the morphology of fish scales can generally be used to identify the species of fish that it came from. Its scales are primitive as well, each being covered with 'ganoin', a substance with similarities to tooth enamel. [9] Similar to the type of scales found in sturgeons ...
These perciform fish, an order of ray-finned fish that are "perch-like", characteristically have teeth fused into a parrot-like beak during adulthood. They diagnostically have a single dorsal fin and body covered in small scales that are known as ctenoid scales .
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Heterophyes heterophyes, or the intestinal fish fluke, was discovered by Theodor Maximaillian Bilharz in 1851. This parasite was found during an autopsy of an Egyptian mummy. [ 1 ] H. heterophyes is found in the Middle East, West Europe and Africa. [ 2 ]