ctenoid scale
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Ctenoid scales are a type of scale found on advanced fish, such as perch and sunfish. They are similar to cycloid scales but have a distinctive comblike edge. These scales are made of bone and are part of the dermal layer of the skin, providing protection.12
Scales in fish have evolved significantly. Primitive fish had thick, bony plates, while modern teleost fish have thinner, more flexible bony scales. Ctenoid scales, along with cycloid scales, are characteristic of higher bony fishes. The term "Ctenoidei" itself refers to an artificial grouping of fishes that possess these ctenoid scales.234
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scale, carp) or ctenoid scales (e.g., perch; sunfish). These are the typical overlapping fish scales. Cycloid scales are large, thin, and round or oval in shape, and they exhibit growth rings. Ctenoid scales resemble cycloid scales but have comblike teeth on their overlapping edge.
Read More, carp) or ctenoid scales (e.g., perch; sunfish). These are the typical overlapping fish scales. Cycloid scales are large, thin, and round or oval in shape, and they exhibit growth rings. Ctenoid scales resemble cycloid scales but have comblike teeth on their overlapping edge.
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Ctenoid scales are similar to cycloid, except that they have spines or comblike teeth along their free edges; these scales are characteristic of the higher bony fishes—perches and sunfishes, for example. Some fishes, such as catfishes and some eels, have no scales.
Read MoreCtenoid scales are similar to cycloid, except that they have spines or comblike teeth along their free edges; these scales are characteristic of the higher bony fishes—perches and sunfishes, for example. Some fishes, such as catfishes and some eels, have no scales.
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