A silver perch does not have silver in it's skin. The shiny iridescence of the silver perch's skin and of many scaly fish skin comes from photonic crystals made of guanine. These crystals, while atomically similar to crystals grown in the laboratory, microscopically are very different and form overlapping sheets giving the crystals maximum reflectance. Most researchers believe this shiny skin evolved to fool predators by reflecting light away from the fish, especially when close to the water surface.
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No, a silver perch does not have actual silver in its skin. The name "silver perch" comes from the fish's silvery, shiny appearance due to the scales on its skin reflecting light.
There are three species of the perch: Percaflavescens (Yellow perch), Perca fluviatilis(European perch) and Perca schrenkii (Balkhash perch).
A perch.
The perch belongs to the Osteichthyes superclass.
A perch is a freshwater fish. It has a spine, so is a vertebrate.
Perch are not segmented. They have a continuous body structure with distinct fins and scales. They are a type of elongated, carnivorous freshwater fish.