The lobster which pinches Red Herring is bright red. Lobsters acquire their red color after being boiled. Live lobsters are a dark greenish-brown color.
When Daphne and Velma are examining Al's trophies, Velma's lips are moving, but Daphne's voice is heard reading the inscription.
When Scooby runs over to the Hot Dog vendor and asks for two, he holds one finger.