It seems that his species of penguin is a rockhopper or macaroni, meaning that he is shorter than the average Animal Jam Penguin. He has downward, arrow-like markings and long, thin feathers coming out of the top of his head that could possibly be yellow in color. He has thick eyelashes, and a darker top-half of his body with flecks underneath and pale eyebrows.
- There is a stone statue of Marco that is sold at the Mystery Emporium, which is located in the Chamber of Knowledge. There is also a bronze version of this statue that is sold at the AJ Birthday Party.
- The name Marco comes from the Italian origin meaning 'of Mars', the Roman god of war.
- His name may be a reference to the explorer Marco Polo.