Two Chambered Heart is Present in

Answer: Two chambered hearts are present in fishes.

• Fish belong to the class of fish with two-chambered hearts, amphibians and reptiles have three-chambered hearts, and birds have four-chambered hearts. 
• Fish is a poikilothermic species found in both freshwater and saltwater worldwide. 
• Hagfish, sharks, bony fishes, and other fish belong to the superclass Agnatha and Chordate phylum, including hagfish, sharks, and other bony fishes. 
• All fish except opah are poikilotherms.