The teen sustained fatal injuries late Monday night after his ride's seat detached at the outdoor amusement park at the coastal Pefkohori resort in northern Greece's Halkidiki prefecture
The attack took place last week in the Gulf of Aden and involved the Greek-owned Liberian-flagged cargo ship 'Tutor'
Authorities were alerted by residents in the same apartment building who detected a foul odor and said they hadn't seen the father and son for weeks
Artemis Theriaki had won several Greek championships and a bronze metal in 2006 European competition