Didi meets his old friend in the port Crazy Joe, with whom he has hunted as a young man rare animals. Crazy Joe pretends to act now with wood, but soon turns out that he still works in his old shameful profession. He soon caught Dolphin, a dolphin and a good friend of Marsupilami. First Didi wants to free the captive dolphin alone, because he is ashamed of his past, but he soon moves on, and now tracks with all our friends together.
Depuis quelque temps, Daphné et Delphi, un couple de dauphins blancs d'Amazonie, ont rejoint le rio Soupopoaro. La sympathie est immédiate avec la famille Marsu. Amanda découvre alors que dauphins et Marsupilamis se comprennent...
