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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 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. Ctenoid scales are similar to cycloid scales, also having growth rings, lack enamel, dentin, and a vascular bone layer. They are distinguished by spines or ...
The bowfin (Amia calva) is a ray-finned fish native to North America. Common names include mudfish, mud pike, dogfish, grindle, grinnel, swamp trout, and choupique.It is regarded as a relict, being one of only two surviving species of the Halecomorphi, a group of fish that first appeared during the Early Triassic, around 250 million years ago.
Reptile scale types include: cycloid, granular (which appear bumpy), and keeled (which have a center ridge). Scales usually vary in size, the stouter, larger scales cover parts that are often exposed to physical stress (usually the feet, tail and head), while scales are small around the joints for flexibility.
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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]
The groobe behind the eyes of these fishes may be complete, running from one side of the head to the other, or there may be just a furrow behind each eye. There are large, ctenoid scales on the body, although some species have cycloid scales on the belly. There are fewer tha than 70 scales in the lateral line.
There are cycloid scales on the head and throat while ctenoid scales cover the other parts of body with small scales present on the soft-rayed part of the dorsal fin. The lateral line scales extend to the tip of the caudal fin. They have a carrot shaped swim bladder which has around 20 pairs of fan-like appendages along its sides, the first ...