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Step 1
Identify common perch by their two dorsal fins, which are separate or slightly joined. With a spined front fin, the perch typically has a soft-rayed rear fin. Often, their anal fins are spined as well.
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Step 2
Find the yellow perch in its native North America, east of the Rocky Mountains. You can identify it by its round, yet slender body with a yellow or golden color and several dark vertical bars on it sides.
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Step 3
Locate the common freshwater perch in Europe and northern Asia. With a green body, it has dark vertical bars that run the length of its side and reddish-orange lower fins.
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Step 4
Distinguish from a darter perch fish, which is common in the freshwaters of North America, east of the Rocky Mountains. Darters typically live on the bottom of quick-flowing streams, laying their eggs in sandy stream bottoms or in weeds.












