Puffer loves to tell tall tales. He has even been known to cry "shark" to get himself out of a bind. But what happens when there really is a shark lurking near the coral reef? Will Puffer's friends believe him or will his tall tales put them all in danger?
Rainbow Fish and his friends are all playing but Puffer sees shadows and cries out SHARK several times, until it's the real deal and the kids don't listen to him and almost die. They see how serious it was but how serious it is not to lie all the time. Puffer realizes he can't lie either.