Rocket Raccoon is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Bill Mantlo and artist Keith Giffen, the character first appeared in Marvel Preview #7 (Summer 1976). He is an intelligent, anthropomorphic raccoon, who is an expert marksman and master tactician. His name and aspects of his character are a nod to The Beatles' 1968 song ''Rocky Raccoon''.

Is it true that is rocket from guardians of the galaxy a raccoon?
yes