Zak is the third member of Captain Zero's Z stack fleet, he's used for a wide variety of tasks around Bigg City Port. Zak's main role was that of a flunky to devious Zorran: a confused thug. The heavy, no malice in him. He's usually seen working with his brother Zebedee.
- His design is loosely based on the Moran Fleet of NYC waters from the 1920's.
- Zak is voiced by British actor, animator and modeller Shaun Prendergast, who provided the distinctive voice of Sunshine.
- In TLC and PBS Kids's Salty's Lighthouse, He turns Good, he's voiced by Terry Klassen, giving him a gruff Brooklyn accent.
- In the Japanese version he was voiced by Hideyuki Umezu.