Fearless sea creature Fishtronaut is a secret agent who is able, thanks to his Bubblex suit, to jump out of the water and explore dry land while trying to solve mysteries. He isn't on his own, though. The fish's team includes curious 8-year-old Marina, who has an aquawatch that helps her keep in touch with Fishtronaut when they are separated; Zeek, a monkey whose tree-climbing skills and finely tuned sense of smell make him valuable to the team; and wise older fish Happy Plumb, who can point Fishtronaut in the right direction whenever the youngster is stumped. Also assisting the team is Marina's grandfather, Dr. Green, who is the caretaker of the park the team patrols and who helps her find answers when she's stuck.
