Labros Hydras, who was vacationing in Papa Nero from his home in Washington, D.C., said he discovered the six-tentacled octopus while snorkeling with his son, Arion, and daughter, Areti, The Sun reported Monday.
Hydras said he took the hexapus to a local restaurant and the chef cooked it up for his family.
However, Hydras said he felt bad about devouring it after learning only one hexapus had ever before been found, in Wales.
"NOBODY had a clue how rare this specimen was, including the cook," Hydras said in a later email to United Press International. "That is why it was used like a normal octapus. That was wrong and that is why I have done EVERYTHING in my power to alert everyone on the subject so this does not get repeated. It is not known if this was just a single hexapus or if this abnormality exists in a family or a group in the area. Awareness is the issue."