MSD Manual

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Internal anatomy, koi
Internal anatomy, koi

    Basic internal anatomy of a female koi (Cyprinus carpio) with the left ovary removed. Visible are the two lobes of the gas bladder, with the posterior kidney between. Also visible is the spleen (dark red), and the diffuse hepatopancreas which is associated with the intestinal loops.

Courtesy of Dr. Denise Petty.