This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Medusae of worldvol fig. en Chiropsalmus quadrigatus Haeckel side view of halfgrown medusa Drawn by the author from preserved specimen collected by the Albatross enlarged side view of senseclub inner side of senseclub oral view of stomach showing the lips and gastric sacs enlarged view of gastric cirri side view of pedalium with