He is a light purple fish with sunglasses and a goatee, he also wears a light green shirt as a pedestrian. He has light orange pants. He has a light blue back fin. His hand fins have two darkened lines compared to the rest of the body.
He is friends with Harold and Harold usually lends money from him. He is seen in SpongeBob's short-lived mansion. Bert always needs to borrow money from Harold.