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Where are the gill openings located on sharks?
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chondrichthyan
Southern stingrays (Dasyatis americana or Hypanus americanus) are found in the western Atlantic Ocean.
In sharks, the gill openings are located on the sides of the head. Unlike rays, which have their gill openings confined to the lower surface of the body, sharks possess five to seven fully developed gill clefts that open separately to the exterior on the lateral sides of the head.1