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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.
Cycloid scales have a smooth outer edge, and are most common on fish with soft fin rays, such as salmon and carp. Ctenoid scales have a toothed outer edge, and are usually found on fish with spiny fin rays, such as bass and crappie .
The scales on its body are composed of round lateral scales called cycloid scales. It has a slightly subterminal mouth and no adipose fin. Like other members of the family Cyprinidae, the pallid shiner is a toothless fish and has no stomach. Instead they chew their food using gill rakers on their gills and pharyngeal teeth. [6]
These scales cover the fish's body with little overlapping. They are typical of gar and bichirs. Cycloid scales are small, oval-shaped scales with growth rings like the rings of a tree. They lack enamel, dentin, and a vascular bone layer. Bowfin and remora have cycloid scales.
This species has very large cycloid scales, below which is a thick layer of fat. The swim bladder has two anterior projections that extend into the back of the skull, near the inner ear. [ 7 ] This fish lacks the median keel on the caudal peduncle – it only has the characteristic pair of small keels on each side of the base of the caudal fin ...
With over 300 known species, there are more species of minnows native to North America's fresh waters than any other fish. [2] Minnows can be hard to distinguish because many look alike. [3] All minnows have one dorsal fin, ventral fins near the anus, a lateral line system (in most species), and smooth, round cycloid scales. [4]
These scales are a clue that this species is primitive in comparison to other teleosts, many of whom have ctenoid scales. For species of fish with either version of leptoid scales, the age of the fish can be determined by examining the pattern of ridges on a scale, similar to how tree trunk rings display the age of a tree.
Fish of this species are usually deep-bodied, flattened sideways, and somewhat circular or rounded, with blunt noses and small mouths with weak teeth. Some other characteristics of this fish are the absence of ventral fins, one long, continuous dorsal fin, long pectoral fins, and tiny, cycloid scales. The tail fin is nearly as long as the ...