They look like normal sausages but are connected one by one.
Role in episode
When SpongeBob and Patrick are enjoying the food released from the sky (which they believe was brought to them by the Magic Conch Shell), Squidward looks at the table and says "Oh, smoked sausages! My favorite!" He sniffs them, so much so that they get stuck his nostrils, and is going to eat them, but unfortunately Patrick has already sucked them into his mouth, like a vacuum cleaner.