|Step 13: Fold down the fin (loose flap).|
|Step 14: Turn over.|
|Step 15: Now fold down the other fin.|
|Step 16: Create the tail by folding the bottom corner of the figure to the side, then unfold.|
|Step 17: Now we'll attempt an outside reverse fold.
Open the the whale and bend the tail backwards along the crease. Both sides of the tail sould wrap around the edge.
|Step 18: Finish! Your tail should look like this when you're done.
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