Eisenbarth designed his own medical instruments, including a cataract needle and a polypus hook. Calliactis polypus is a species of sea anemone in the family Hormathiidae. "C. polypus" is found in the Indo-Pacific area and the Red Sea. "C. polypus" lives as a commensal with several species of hermit crab including "Dardanus gemmatus". Polypus is a fungal genus of uncertain familial placement in the order Russulales.