Fish scale

（重定向自Placoid scale）

Cycloid scales cover these teleost fish (rohu)

Cartilaginous fishes, like this tiger shark, have placoid scales (dermal denticles)

Placoid scales as viewed through an electron microscope. Also called dermal denticles, these are structurally homologous with vertebrate teeth.

Cycloid (circular) scalesThe cycloid scale of a carp has a smooth outer edgeThis Poropuntius huguenini is a carp-like fish with circular cycloid scales that are smooth to the touch

The skin of most fishes are covered with scales. Scales vary enormously in size, shape, structure, and extent, ranging from strong and rigid armour plates in fishes such as shrimpfishes and boxfishes, to microscopic or absent in fishes such as eels and anglerfishes. The morphology of a scale can be used to identify the species of fish it came from.

单词	Placoid scale
释义	Placoid scale 英语百科 Fish scale （重定向自Placoid scale） The skin of most fishes are covered with scales. Scales vary enormously in size, shape, structure, and extent, ranging from strong and rigid armour plates in fishes such as shrimpfishes and boxfishes, to microscopic or absent in fishes such as eels and anglerfishes. The morphology of a scale can be used to identify the species of fish it came from.
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