Nonny is a guppy who appeared in every episode of Bubble Guppies. He is "Mr. Cautious" of the group.
Nonny is calm, and he says that some animals make him nervous, and he knows what any word means. He likes to read books, and he likes the violin of the orchestra. At lunchtime, he usually has something silly in his lunch. In "Can You Dig It?", he was amazed when he sneezed really loud and uncovered a real triceratops skeleton, and he sang a song about how he wasn't disappointed, because he found a real dinosaur skeleton.
Nonny has light skin, orange, fiery hair, and he wears blue glasses which resemble scuba goggles. He has a dark green and light green striped tail.