They are a large group of small scallops who are colored light orange with have purple mouths.
The chocolate-eating scallops are seen in "Valentine's Day" when they fly after Sandy's Chocolate balloon, but the latter uses her karate skills to defend them off. However, one of the scallops bites the balloon, causing it to go down.
Near the end of the episode, Sandy is seen on the newly patched balloon with the scallops dragging it. After the balloon lands, they fly into the air.