Did Fish Have Scales?
Like Most Animals, All Fish Have Skin. Many Fish Have an Outer Covering of Scales. Scales Protect Fish, Much Like a Suit of Armor. All Fish Have a Slimy...
Like most animals, all fish have skin. Many fish have an outer covering of scales. Scales protect fish, much like a suit of armor. All fish have a slimy covering of mucus.
When did fish develop scales?
The earliest scales might appear in the Ordovician period from 444 million to 485 million years ago. There is a trend of scales evolving from thick and heavy to thin, light and soft, enabling fish to swim swiftly, said Cui.
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Why do fish have no scales?
Fishes that don't have scales include the clingfish, catfish and shark family, among others. Instead of scales, they have other layers of material over their skin. They can have bony plates that are also covered by another layer or tiny, teeth-like protrusions covering their skin.
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
