Carl Benjamin Klunzinger (18 November 1834, in Güglingen – 21 June 1914, in Stuttgart) was a German physician and zoologist.
He studied medicine at the Universities of Tübingen and Würzburg, afterwards attending lectures on geology and zoology in Vienna and Prague.
Beginning in February 1864 he worked as a physician at Kosseir, a seaport on the Red Sea.
Here he spent five years collecting a vast quantity of fish and other marine specimens.
From 1869 he examined his Red Sea collection at the Staatliches Museum für Naturkunde Stuttgart, traveling to Frankfurt and Berlin in order to conduct zoological comparison studies.