The Squid Doodle resembles a jellyfish, but with Squidward's face. Being a drawing, it has a 2-D appearance that is black and white in color.
Role in the episode
When Patrick drew the doodle on the ground, SpongeBob thought it was another jellyfish, as he drew one earlier, but Patrick said that it was Squidward. It soon came to life, shaking its fist and yelling gibberish. It is soon erased by Patrick because they couldn't allow it to roam around town, prompting Patrick to say, "Poor Squidward."