Bubble Puppy is a playful, boisterous little puppy with a fish tail. Though he is particularly loyal to Gil, Bubble Puppy loves to play with all the Guppies, especially if he gets to pop a bubble. His favorite treat is Bubble Bites, he especially likes it when Gil throws one in the air so he can preform a trick and catch it in his mouth.
Bubble Puppy is mostly white. His right ear is white with two orange spots, and his left ear is completely orange. He has two small black eyes with two small eyebrows above them, and he has a big black nose. He has a pink tongue. He also wears a green collar with a gold-and-orange striped fish shaped tag. His right eye has a big orange spot around it, and he also has an orange guppy-like tail.
Bubble Puppy has appeared in every episode of Bubble Guppies. His first appearance was in "Bubble Puppy!".
Bubble Puppy is most likely a Jack Russell Terrier. As they have V shaped ears, markings, and identicle colors.