Sherman
A big-hearted, dim-witted creature, he is nonetheless a great white shark, at the top of the food chain.

Megan
Sherman’s man-eating, high-maintenance wife. With her requisite strand of pearls and Louis Vuitton purse, Megan possesses a ruthless yet nurturing nature. Think of her as the underwater version of Martha Stewart.

Fillmore the Sea Turtle
Sherman’s best friend. A single father, desperately searching for a she-turtle mate, he is decidedly unphysical and slightly pompous. Fillmore is a philosophical sort who does what he can to make up for Sherman’s lack of common sense.

Hawthorne
An ornery hermit crab with an unquenchable entreprenurial drive. As the unopposed Mayor of Sherman's Lagoon, when he's not perpetrating a business on his own, he's into everyone else's personal business.

Ernest
A precociously brilliant young fish with the technical savvy and questionable intentions of an ace computer hacker.

... and Introducing Herman
Sherman's and Megan's baby son.