The Elephant Bubble is an elephant shaped bubble that is blown by SpongeBob in the episode "Bubblestand."
The bubble is translucent and in the shape of an elephant.
In "Bubblestand", SpongeBob blows this bubble and Patrick mistakes it for a giraffe instead. The bubble pops in Squidward's house. When it popped, it made a loud elephant trunk sound and many bubbles came out.