mention four character of picses
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Skin covered in scales.
Ectothermic, cold blooded.
Soft shelled eggs that must be laid in water.
External fertilization.
All members are fully aquatic.
Limbs modified into fins.
Gas exchange through gills.
Ectothermic, cold blooded.
Soft shelled eggs that must be laid in water.
External fertilization.
All members are fully aquatic.
Limbs modified into fins.
Gas exchange through gills.
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