Kleptocnidy

Kleptocnidy (/klɛptnd/ klept-oh-NY-dee), or nematocyst sequestration, is the process whereby organisms take and make use of the cnidocytes (stingers, also known as nematocysts) of digested prey. Sequestered cnidocytes are known as kleptocnidae, and are used for defense or to capture prey. Sea creatures preyed on for their cnidocytes include jellyfish, hydroids, sea anemones, corals, and other cnidarians with cnidocytes.