He is a light blue and turquoise fish who wears red-orange shorts. He has blue lips, blue arms and legs, and a blue fin. A bikini-wearing version appears alongside him in the episode "SpongeGuard on Duty." That version also appears in the episode "Extreme Spots."
He seems to be fond of eating Krabby Patties since he is a regular customer at the Krusty Krab. He also appears to be fond of magic because in the episode "Hocus Pocus," he stars in a magic kit commercial and seems to enjoy the product. He even appears as a magician in "My Leg!". Although, he may have been paid to act that way so that people (like SpongeBob) would buy the product.
In "Walking Small," he randomly sits right on SpongeBob's face for no reason. Plankton tells him to be assertive and command him to get off but SpongeBob just asks him nicely. He later gets up before SpongeBob could command him to get off.