These are exclusively aquatic animals, commonly called Fish. Their skin is covered by scaly plates. The body is streamlined. A muscular tail helps in the movement. Respiration occurs through gills. The heart is present with two chambers. Examples are Tuna, Rohu, Anglerfish, and Electric ray.
#Cyclostomes #pisces #biology
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Негізгі бет Cyclostomes and Pisces | Hindi | Biology
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