Marina is a child human brown-haired girl very intelligent. Is the best friend of Fishtronaut and likes world around her and support to Fishtronaut in his missions. Is keept communicated with Fishtronaut to long distance, thanks to her water clock and it gets excited when arrives the pop.

Is a bright and curious girl who proves everyday to be a valuable member of the Park’s spy team. Whenever she and Fishtronaut happen to be apart, she can always use her trusty aquawatch to stay in touch.